World Wars And The Great Depression - 1262 Words

I’m amazed at how many Americans don’t know their own family heritage any further back than their grandparents. For many years, I was one of them. I would casually tell people, â€Å"My family never really talked much about our family tree, because we were afraid we’d find horse thieves hanging from the branches.† But, bad or good, I always wondered about my roots. I’m not alone. Millions of Americans have the same questions. So, what happened? Were so many of our families separated in the westward expansion that we lost our connections to the past? Were families in such crisis during the World Wars or the Great Depression that mere survival was their only focus? Was there a generation that just wanted to forget the past? Was it the â€Å"live for today† mentality of the ‘60s that deemed it â€Å"old fashioned† to have any roots or history? It was probably a combination of many factors, but the affect of the loss of our personal histories has been far-reaching. Without fail, when someone discovers the stories in their own family tree, they become empowered and inspired. I know this from personal experience, because eight years ago, someone helped me discover my lost family legacies, and it changed me forever. I found stories of great sacrifice, courage, conviction, service, struggle, conflict, diversity and triumph. Some of my ancestors lived in a cave for the first few years and purchased land rights from the Native Americans who helped them plant new crops and buildShow MoreRelatedWorld Wars And The Great Depression Essay1608 Words   |  7 Pagescontrolled by the oligarchy for the sake of â€Å"national security† or economic and social cooperation. Although this had been a theme throughout hundreds of dystopian novels, such overarching influence is lamentably applied in societies throughout the world. Historically, nation/states across the globe have manipulated information regarding controversial events to maintain the national identity, of which had facilitated cooperation by creating a common enemy. Throughout history, the majority have madeRead MoreWorld Wars And The Great Depression1059 Words   |  5 Pagesscene† (1977, 6.) Basically, Polanyi wants economists to give due acknowledgement to the role of politics and other kinds of social interactions. This is best seen in The Great Transformation, where Polanyi explained the chaotic disruptions in the first half of the twentieth century—colonialism, world wars and the Great Depression—by pointing to the â€Å"self-regulating market† established in Britain in the nineteenth century. The general orientation was that the market had become the prime institutionRead MoreWorld War II And The Great Depression1658 Words   |  7 Pages The highly numbered risks of war have rigorous effects on societies around the world. World War II had positive and negative effects during and after the war. After the war, the formation of the Uni ted Nations helped negotiate and maintain peace, and during the war more jobs helped get the United States out of its biggest economic crisis, the Great Depression. Although, some economists argue that by creating more jobs during World War II, put America into even more debt than the country was alreadyRead MoreWorld War II : The Great Depression1543 Words   |  7 PagesDanielle Gentry Gary Damon American History II 10:00 MWF 25 April 2016 World War II Two decades after the first World War happen another world war occurred known as World War II. There were many causes that led up to this war. The Treaty of Versailles ended World War I, but Germany had to accept the responsibility of the war. Therefore, Germany economy went downhill and people were starving because of war debt. The Great Depression had a big effect on a lot of countries; therefore, countries startedRead MoreWorld War I And The Great Depression1131 Words   |  5 Pageswas booming and the people were relishing in the modern society. When the Great Depression hit Americans continued to hold an isolationist stance as they focused on the deteriorating situation going on at home. Throughout this time period of 1920 to 1941, America dealt with major events, such as the end of World War I to the Roaring Twenties turning into the Great Depression in 1929, and then the beginning of World War II, along with the attack on Pearl Harbor in 1941. As these events took placeRe ad MoreThe Great Depression And World War II Essay1391 Words   |  6 Pagescatastrophes occurred: the Great Depression and World War II. American political leaders established a cause-effect relationship between economic collapse and total war, based on these two events, which defined their policy approach in the post-war period. In the 1930s, American leadership, and most importantly, President Franklin Delano Roosevelt, came to view economic decline, political radicalization, and instability as forming a vicious cycle that led to utter chaos and war. Although FDR did not knowRead MoreWorld War I And The Great Depression1598 Words   |  7 PagesBefore World War I, the United States was in a period of isolationism, and a determination to stay out of European wars and affairs, while trying to maintain its status as one of the world’s biggest superpowers, militarily and economically (â€Å"United States Before†). America was just exiting the Gilded Age, which was an important time of growth and prosperity. Despite this, the American economy was in a small recession when entering the war, which was reversed by a 44 month period of growth causedRead MoreThe Great Depression And World War II1507 Words   |  7 PagesFaced with the Great Depression and World War II, Franklin D. Roosevelt, nicknamed â€Å"FDR,† guided America through its greatest domestic crisis, with the exception of the Civil War, and its greatest foreign crisis. His presidency—which spanned twelve years—was unparalleled, not only in length but in scope. FDR took office with the country mired in a horrible and debilitating economic depression that not only sapped its material wealth and spiritual strength, but cast a pall over its future. RooseveltRead MoreThe Great Depression Of The World War I1261 Words   |  6 Pagesmass effect what happens; death, trench warfare, suffering of countries, of world war 1, the countries have began another war, WWII. I know this is a shock to you, but another war has begun. So let us sit down, I will let you take a breath, and when you are ready to begin, I will show you what the spark of WW11. There is a new leader instilled in Germany! WWII was caused by the invasion of Poland, and France declaring war on Germany, Italian fascism in the 1920s, Japanese militarism, appeasement,Read MoreThe Great Depression And World War II955 Words   |  4 PagesIn America, the period between the Great Depression and World War II was rife with uncertainty. The struggles of the Great Depression were over, but their lasting effects shed doubt on America’s future. Persephone, was an attempt by Thomas Hart Benton in 1939 to cement regionalism as the official American art style during this era. However, despite his attempt to promote hope in America’s future, while still acknowledging the despair of the Great Depression, Persephone was regarded as obscene. Regionalism

Is Technology a Solution or a Danger to Our Health and...

Is Technology A Solution Or A Danger To Our Health And Society? Over the last few years of my life, technology evolved in an abrupt manner. Science and its inventions over the centuries have made life easier and enjoyable. The future of genetics, neuroscience, and biotechnology bear the potential to transform our world for the better. Any technology that offers benefits will usually come with risks as well. In order to make wise decisions about using a technology, we must understand its potential impacts well enough to decide whether the risks are acceptably low. Here I think that we have become so dependent on technology so we can barely function without it. Obsessions with looking younger and beautiful through plastic surgery have taken hold in this society. But in what we dont think is that we are meddling up with nature, and we believe no consequences will be paid. As curious creatures we keep pushing the limits of one form, of technology or another or another. We keep pushing its boundaries and its capacity to keep track of it. Before I co uld point out the impacts of technology in our health and society, weather solution or danger, I needed to know what technological advances were already out of control. While I did not find such dangerous potentials, I found dangerous situations involving Genetic Engineering, which is the direct manipulation of an organisms genome using biotechnology. Scientists already acutely experimented with cloning and genetic heritage.Show MoreRelatedTechnology Vs Humanity : A Discussion Of Fahrenheit 4511538 Words   |  7 PagesTechnology Vs Humanity: A Discussion of Fahrenheit 451 Fahrenheit 451 is a dystopian novel about a society that orchestrates its citizens’ actions through mass media propaganda and censorship. The government controls its citizens’ freedom of thought and individualism through various manipulations, most importantly television and the banning of books. The government in the novel furtively influences the population by allowing no insightful television broadcasts that could lead to dissention orRead MoreTest-Tube Babies Analysis1207 Words   |  5 PagesIn Vitro fertilization: Analysis of Ruth Hubbard’s Article. â€Å"Test-Tube Babies: Solution or Problem?† Ruth Hubbard’s â€Å"Test-Tube Babies: Solution or Problem?† first appeared in Technology Review in 1980. Hubbard addressed her audience with an initial objective tone, revealing the built up to her credibility on the issue of in vitro fertilization. Hubbard having specialized in biochemistry of vision and women’s health enforces the sense in the reader that she is to be trusted on this topic. HubbardRead MoreThe Effects Of Technology On Younger Children1319 Words   |  6 Pages Health Effects from the Use of Technology in Younger Children The modern times we live in today are constantly changing in hopes that we as humans thrive successfully. To be more specific, technological advancements are driving our society into new feats that could never be imagined in the past. Thanks to this technology, we have excelled in vital fields such as medicine, education, engineering, and many more aspects that can be considered vital for our benefit, let alone our existence. ModernRead MoreA Devastating Problem: Tornadoes668 Words   |  3 PagesThey are incredibly dangerous and unpredictable. Tornadoes have the power to entirely level massive structures in one fowl swoop, without ever leaving a single part standing. Tornadoes are most common in the U.S. and warrant a serious problem for the health and safety of its citizens. Tornadoes are a deadly force of nature. They cause massive destruction and death. â€Å"Tornadoes are the most violent of all atmospheric storms.† (www.nssl.noaa.gov 1) As displayed by this information, there is no doubtRead MoreTechnology Has Changed Our Lives Essay1440 Words   |  6 PagesTechnology Has Taken Over Our Lives Our society has become dangerously dependent on technology. Easy access to technology during every minute of the day can be useful at some points, but overall is not necessary. Specific problems, and causes will give us a glimpse into our growing dependency and how it is affecting our lives in various ways, none of which are appealing. Our society has become too dependent on technology. New technology used in areas such as medicine, business, manufacturing andRead MoreFossil Fuels And Its Impacts On Society1506 Words   |  7 Pageshas several negative impacts on society. For example, fossil fuels pose a serious danger to the environmental through climate changes and global warming. Additionally, as fossil fuels become more scarce the prices will significantly increase. One way to alleviate the negative impacts of fossil fuels is by investing research and development into sustainability. Sustainability refers to the use of renewable energy resources to sustain the current processes of society and the economy. SustainabilityRead MoreFossil Fuels And Their Impact On The Environment862 Words   |  4 PagesFossil Fuels and Their Impact on the Environment The amount of fossil fuels being deposited into the air should be controlled. Not only do fossil fuels pose a threat to the environment, but also to human health. The problem is not only noticeable in the depletion of human health, but also in the air, water, and land. Emissions are a concerning contribution to other problems such as global warming and greenhouse gases as well. One of the major factors of fossil fuels are vehicles. VehiclesRead MoreCell Phones And Its Impact On Society1575 Words   |  7 PagesStates, possess his creation in their pockets (Mobile Technology Fact Sheet). Little did he know that these complex devices could grow to their current demand and start to pose a danger to society. Cell phones are a detrimental technology that is disrupting our way of life. The creator of the mobile phone, Martin Cooper, had an interesting history leading him up to the invention of the cell phone. Born on December 26, 1928, in Chicago, Illinois our father grew up as a mechanical wizard, and after enlistingRead MoreEssay on Are Video Games Really A Major Issue for This Generation?528 Words   |  3 Pages There are various problems facing the world such as health care, gun control, and concerns of how the growing advances in technology will influence the generation. An issue that many people would not think of is video games. Most people are one sided, either seeing the medias portray as fun and playful or a danger to your kids and the cause of our generations laziness. What most people dont realize is how the smaller factors of our everyday lives, leisurely activities such as video games, isRead MoreNegative Effects Of Cloning1301 Words   |  6 Pageswith cloning. Cloning was more of an experiment for animals and began growing until the scientists were wanting to try on human beings and other organisms. Cloning has positive and negative results, but the negative impacts that cloning has toward society and the ecosystem are huge and the experimentations shouldn’t keep growing. Cloning is an immense part of excitement for scientists and the operations frequently come out positive. As of 2016, no human being had yet been cloned, but ethical debates

Hitting a Baseball Free Essays

It has been a proven fact that hitting a baseball is one of the toughest things to accomplish in sports. In the major leagues if you fail 7 out of 10 times you are still considered to be an incredibly good hitter. That statistic shows how challenging it is even for Athletes at the professional level to produce a perfect swing. We will write a custom essay sample on Hitting a Baseball or any similar topic only for you Order Now In order to achieve this perfect swing there is a series of adjustments that must be made. In this essay I will show how hitting a baseball develops through 3 different stages of learning. When someone is first starting off usually around the ages of 7 to 9 , they do not understand that the way a bat is held effects the outcome of the swing. In the beginning process many tend to place the bat in their palm and grip it extremely tight, without aligning their knuckles. They do not realize that holding the bat this way will reduce the range of motion in the swing, causing slower bat speed. Another key component to hitting a baseball is the hitter’s stance. In the beginning stage many crowd the plate, with their toes pretty much touching the corner of the tip of the plate. The legs are extremely bent and the toes are pointing in two different directions. The hands are then placed right next to the ear with both elbows facing up. The hitters back is usually arched at the top, with their shoulders kinds of pushing in to the neck. As the ball is pitched the hitter does not take a step towards the pitch, instead they keep their feet planted on their heels. When the ball is getting closer they begin their swing by dropping the back elbow and lifting the front one up. As the bat begins to cross the plate the head begins to turn away from the ball, because they are using no hip action. The bat is stopped in front of their body, creating no follow through. There may be little or no contact at this point. As a hitter progresses around the middle school stage, one thing they begin to change is the way they grip the bat. Now that they are a little more informed they begin to align the knuckles and place the bat on the fingers instead of on the palm. The hitter now has more flexion in the wrist along them to better their chances of hitting the ball. The stance of the batter is now gradually changing as well. The batter is now able to get in a position to where they can feel a little more comfortable. The knees are just are just slightly bent still allowing them to have some mobility. The toes are both facing in the same direction but are still planted on their heels. The elbows are now facing down instead of up, and the hands are up just above the shoulders and away from the ears. The back is no longer arched and the hitter is now at a stance where they are not as stiff as they once were. As the pitch comes the hitter now takes a step forward to generate some force, and prepare for his swing to begin. As the pitch is coming the hitter now keeps his eyes on the ball as it is coming in and extends hit arms out toward the baseball but slightly drops the barrel of the bat because of this, the hitter might have a tendency to pop the ball up instead of hitting a solid line drive. At this point the swing has now gotten better but still it has not generated bat speed to its full potential. Once the collegiate level is reached the batter now understands all the key fundamentals to hitting a baseball. With many years of practice and execution the hitter’s swing is now at its perfect state making it much easier to create contact and power. At this point the hitter no longer has any difficulty with the grip of the bat, or stance. Their feet are at shoulder width length allowing them to be at their most powerful position. The hitter is on the balls of his or her feet and is no longer on the heels. As the pitch is coming the hitter shifts his weight from the front leg to the back leg. The hitter is creating negative force by taking a step back, then going forward once again. At this point, weight should be about 70 percent on the back leg, 30 percent on the front leg. This allows the hitter to stay on the back leg to generate the most amount of power possible as they are swinging. While this is happening the hitter must also shift his hand back to generate more power in the upper body as well. The next step is the key essential where many beginners go wrong when trying to hit a baseball. Many believe that the hands trigger the swing, but this is untrue. It is the explosion of the hip that creates the swing. The hips start to open and allow the hands to explode through the hitting zone at a much higher rate of speed than if the hands triggered first and were still inhibited by the body. This has been proven by some of the most respected hitting authorities in the world by using high speed motion detection software to analyze a hitter’s swing. Once the hips have started to open, the hands shoot through the zone. The hitter drives the nob of the bat to the ball, and keeps the bat through the zone as long as possible. This makes it easier to hit the pitch no matter where it is thrown. Once the bat has made contact the hips naturally finish their rotation as the hands leave the hitting zone and follow through. The weight shifts forward into contact, and all of the steps come together into a fluid, quick swing. Now the batter can produce hard linedrives or homeruns instead of soft grounders or pop ups. How to cite Hitting a Baseball, Essay examples

Hitting a Baseball Free Essays

It has been a proven fact that hitting a baseball is one of the toughest things to accomplish in sports. In the major leagues if you fail 7 out of 10 times you are still considered to be an incredibly good hitter. That statistic shows how challenging it is even for Athletes at the professional level to produce a perfect swing. We will write a custom essay sample on Hitting a Baseball or any similar topic only for you Order Now In order to achieve this perfect swing there is a series of adjustments that must be made. In this essay I will show how hitting a baseball develops through 3 different stages of learning. When someone is first starting off usually around the ages of 7 to 9 , they do not understand that the way a bat is held effects the outcome of the swing. In the beginning process many tend to place the bat in their palm and grip it extremely tight, without aligning their knuckles. They do not realize that holding the bat this way will reduce the range of motion in the swing, causing slower bat speed. Another key component to hitting a baseball is the hitter’s stance. In the beginning stage many crowd the plate, with their toes pretty much touching the corner of the tip of the plate. The legs are extremely bent and the toes are pointing in two different directions. The hands are then placed right next to the ear with both elbows facing up. The hitters back is usually arched at the top, with their shoulders kinds of pushing in to the neck. As the ball is pitched the hitter does not take a step towards the pitch, instead they keep their feet planted on their heels. When the ball is getting closer they begin their swing by dropping the back elbow and lifting the front one up. As the bat begins to cross the plate the head begins to turn away from the ball, because they are using no hip action. The bat is stopped in front of their body, creating no follow through. There may be little or no contact at this point. As a hitter progresses around the middle school stage, one thing they begin to change is the way they grip the bat. Now that they are a little more informed they begin to align the knuckles and place the bat on the fingers instead of on the palm. The hitter now has more flexion in the wrist along them to better their chances of hitting the ball. The stance of the batter is now gradually changing as well. The batter is now able to get in a position to where they can feel a little more comfortable. The knees are just are just slightly bent still allowing them to have some mobility. The toes are both facing in the same direction but are still planted on their heels. The elbows are now facing down instead of up, and the hands are up just above the shoulders and away from the ears. The back is no longer arched and the hitter is now at a stance where they are not as stiff as they once were. As the pitch comes the hitter now takes a step forward to generate some force, and prepare for his swing to begin. As the pitch is coming the hitter now keeps his eyes on the ball as it is coming in and extends hit arms out toward the baseball but slightly drops the barrel of the bat because of this, the hitter might have a tendency to pop the ball up instead of hitting a solid line drive. At this point the swing has now gotten better but still it has not generated bat speed to its full potential. Once the collegiate level is reached the batter now understands all the key fundamentals to hitting a baseball. With many years of practice and execution the hitter’s swing is now at its perfect state making it much easier to create contact and power. At this point the hitter no longer has any difficulty with the grip of the bat, or stance. Their feet are at shoulder width length allowing them to be at their most powerful position. The hitter is on the balls of his or her feet and is no longer on the heels. As the pitch is coming the hitter shifts his weight from the front leg to the back leg. The hitter is creating negative force by taking a step back, then going forward once again. At this point, weight should be about 70 percent on the back leg, 30 percent on the front leg. This allows the hitter to stay on the back leg to generate the most amount of power possible as they are swinging. While this is happening the hitter must also shift his hand back to generate more power in the upper body as well. The next step is the key essential where many beginners go wrong when trying to hit a baseball. Many believe that the hands trigger the swing, but this is untrue. It is the explosion of the hip that creates the swing. The hips start to open and allow the hands to explode through the hitting zone at a much higher rate of speed than if the hands triggered first and were still inhibited by the body. This has been proven by some of the most respected hitting authorities in the world by using high speed motion detection software to analyze a hitter’s swing. Once the hips have started to open, the hands shoot through the zone. The hitter drives the nob of the bat to the ball, and keeps the bat through the zone as long as possible. This makes it easier to hit the pitch no matter where it is thrown. Once the bat has made contact the hips naturally finish their rotation as the hands leave the hitting zone and follow through. The weight shifts forward into contact, and all of the steps come together into a fluid, quick swing. Now the batter can produce hard linedrives or homeruns instead of soft grounders or pop ups. How to cite Hitting a Baseball, Essay examples

The Best College Essay Advice Youll Ever Get!

No clue where to begin writing your essays? Dont think you have anything to write about because you havent brought peace to Earth or cured a major disease yet? Not sure what the difference is between a great essay and a great admissions essay, let alone a phenomenal one? Dont sweat it. We have the perfect person to help you with all those questions! Dan Sten, founder of College Essay Organizer, has helped tens of thousands of students write their way into their top-choice colleges. Sign up for this free webinar on The Best College Advice Youll Ever Getwith Dan Sten on Monday, September 19th at 8PM ET for a chance to learn how to: Write your essays strategically as opposed to writing a great essay that doesnt actually help you get accepted Use College Essay Organizer so you can work smarter and get insider tips Avoid classic blunders made by even the brightest applicants You wont want to miss out on this opportunity to ask him any questions you may have about college application essays! Sign up now!

The Best AP Chemistry Review Guide 2017

The Best AP Chemistry Review Guide 2017 SAT / ACT Prep Online Guides and Tips Not sure how to begin studying for the AP Chemistry exam? This review guide will help you figure out what's on the test and how you can ace it. I'll go over the exam structure, provide sample questions in each format, list the concepts you can expect to see on the test, and give you some tips on how to get the most out of your studying. I just looked into my PrepScholar Crystal Ballâ„ ¢ and saw a 5 in your future, so get ready to kick this test's butt. What’s the Format of the AP Chemistry Exam? The AP Chemistry exam is 3 hours and 15 minutes long and has two sections:multiple-choice (90 minutes long) and free-response (105 minutes long).There are 60 multiple-choice questions andseven free-response questions. The free-response section contains three long response (worth 10 points each) and four short response (worth four points each) questions.You're allowed to use a calculator on the free response section, but you can't use one for multiple-choice. Time management is important on the AP Chemistry exam because you can easily get caught up in difficult problems.Try not to spend more than a minute on each multiple-choice question during your first pass through the section so that you don’t miss any questions at the end that you could have answered.You’ll have time to go back and revisit the ones you skipped if you pace yourself.For the free-response questions, you should limit your time to around 5-10 minutes for short response questions and 15-20 minutes for long response questions. What Do AP Chemistry Questions Look Like? The following are examples of official AP Chemistry questions in multiple-choice, short response, and long response format.I’ll go over the answers in detail to give you a sense of the types of problems you’ll face on the test and how you might solve them. Multiple-Choice Sample Question Multiple-choice AP Chemistry questions are often chunked together. In other words, several questions will pertain to a single experiment or dataset.Here’s an example: In this case, you’re asked why a certain outcome resulted from an experiment.You need to know why the pressure in the container would increase based on the changes that occurred.A and B suggest that the increase in pressure has to do with intermolecular attractions either decreasing or increasing in the flask.These choices are incorrect because the intermolecular attractions between these molecules wouldn’t be significant enough to make a difference in the pressure of the container. For Choice C, the first part is correct: the number of molecules has increased with the decomposition of PCl5.It also makes sense that this would result in a higher frequency of collisions with the walls of the container.This answer is looking pretty good. Choice D is wrong because there’s no reason to expect that the molecules have increased in speed inside the container during the reaction. Since we ruled out all the other options, Choice C is the correct answer! Short Response Sample Question For part A, you needed to draw out the interactions between the ions and water molecules in the solution.Three points were awarded for: A representation of at least one Li+ ion and one Cl- ion clearly separated and labeled correctly Each ion surrounded by at least two water molecules Water molecules must be oriented correctly (oxygen end is closer to the lithium ion, and hydrogen end is closer to the chloride ion) Part b was worth one point for identifying the chemical species and providing justification.The species produced at the cathode would be H2(g) and OH-(aq) (you could say either one of these for the point).The hydrogen atoms in water are reduced to H2 at the cathode because this reaction has a lower magnitude reduction potential than that of the reduction of lithium ions to Li (-0.83 vs. -3.05). Long Response Sample Question Here’s an example of a long free-response question from the 2015 exam: This question expects a lot from you. There’s stoichiometry, chemical bonds, intermolecular forces, Lewis diagrams, and thermodynamics!It’s testing whether you can apply a bunch of disparate skills that you’ve learned throughout the year to the scenario presented on the test. Let’s look at part a: For part i of part a, we need to calculate the number of moles of ethene that are produced in the experiment and measured in the gas collection tube. The first step is to calculate the pressure of the ethene so that we can use the ideal gas law to figure out the number of moles of gas produced.We can find the pressure of the water by using the given figure for water’s vapor pressure at 305 K: 35.7 torr.Since 1 atm = 760 torr, we can convert the vapor pressure to atm like so: 35.7 torr x (1 atm/760 torr) = 0.047 atm Then, we can find the vapor pressure of the ethene by subtracting that number from the total vapor pressure of the gas produced: 0.822 atm (total vapor pressure) - 0.047 atm (water’s vapor pressure) = 0.775 atm (ethene’s vapor pressure) Finally, we can use the ideal gas law to figure out how many moles of ethene were produced: PV = nRTn = PV/RTn = (0.775 atm)(0.0854 L)/(0.08206 L atm mol-1 K-1)(305 K)n = 0.00264 moles of ethene produced Ok, now let’s move onto part ii of part a. How many moles of ethene would be produced if the dehydration reaction went to completion?To solve this problem, we need to reference the total amount of ethanol originally put into the tube, 0.2 grams, as well as the molar mass of ethanol.Using these numbers, we can see how many moles of ethanol were put into the tube: 0.2 grams ethanol x (1 mole ethanol / 46.1 grams) = 0.00434 moles of ethanol Ok, that’s the number of moles of ethanol that were put in, but we’re trying to find the number of moles of ethene that would result if the reaction went to completion.Since both molecules have coefficients of 1 in the equation, they exist in a one to one mole ratio.This means that the answer is 0.00434 moles of ethene. Now for part b! The percent yield of ethene in the experiment is pretty easy to find based on our answers to part a.We know that the amount of ethene that was actually produced was 0.00264 moles.The amount that would have been produced if the reaction went to completion was 0.00434 moles. To find the percent yield, we can just divide 0.00264 by 0.00434 and multiply the answer by 100: 0.00264 mol / 0.00434 mol x 100 = 60.8 percent yield In part c, you are asked to agree or disagree with the student's claim that the reaction at 298 K has an equilibrium constant of less than 1 and provide justification in the form of calculations forââ€" ³G °298.According to the formula sheet: ââ€" ³G ° = ââ€" ³H ° - Tââ€" ³S °Ã¢â€" ³G ° = 45.5 kJ/mol - (298 K)(0.126 kJ/ K*mol)ââ€" ³G ° = 8.0 kJ/mol Referencing our formulas again, the equilibrium constant, Kp, is equal to e(-ââ€" ³G °/RT).Since we found that ââ€" ³G ° was greater than 0, Kp has to be e raised to some negative number, resulting in a solution equal to a number less than 1.The student is correct that Kp must be less than 1 at 298 K. Part d asks you to complete a Lewis electron-dot diagram.Your answer would look like this: The diagram should include all the bonding pairs, plus two non-bonding pairs on the O atom. In part e, you're asked to determine the C-O-H bond angle.This molecule is tetrahedral around the oxygen atom.That means that the bond angle is approximately 109.5 degrees.On this question, you got a point for any answer between 100 and 115 degrees.Technically, the bond angle would be a little smaller because of the two unbonded electron pairs on the oxygen atom.For visual reference: In part f, you have to explain why ethene was collected as a gas after the experiment and ethanol was not.This happened because ethene isn’t as soluble as ethanol in water.Ethene is only slightly water-soluble because the weak dipole intermolecular attractions between nonpolar ethene molecules and polar water molecules are weaker than the hydrogen bonds between water molecules.Ethanol molecules are water soluble because they're polar, so they form hydrogen bonds with water molecules as they dissolve. These bears are like ethanol and ethene. The one on the left is ethanol because it's CLEARLY more polar. Again, notice how many different skills we used in this one question. We had to know how to: Calculate the number of moles of a gas that were produced by a reaction given the temperature, vapor pressure and volume (with vapor pressure calculated indirectly) Calculate the number of moles of a gas produced by a reaction taken to completion given the mass of the reactant Calculate percent yield of a reaction Calculate the equilibrium constant of a reaction at a given temperature Draw Lewis electron dot diagrams Determine bond angles Explain how polarity and intermolecular attraction would impact the outcome of a reaction and the states of its products You only have a short amount of time for each free-response question (around 20 minutes for the long ones and 10 for the short ones), so you need to have all the information you learned in the course pretty well-mastered if you want to earn the majority of these points! What Topics Does AP Chemistry Cover? The AP Chemistry course is structured around six main themes or â€Å"Big Ideas.† These Big Ideas encompass smaller, more specific themes that the College Board calls â€Å"Enduring Understandings.†I’ll list the Big Ideas and their corresponding Enduring Understandings in this section.I’ll also provide a more straightforward lists of relevant topics under each Big Idea with links to some notes. Big Idea 1: The chemical elements are fundamental building materials of matter, and all matter can be understood in terms of arrangement of atoms. These atoms retain their identities in chemical reactions. Enduring Understanding 1.A: All matter is made of atoms. There are a limited number of types of atoms; these are the elements. EU 1.B: The atoms of each element have unique structures arising from interactions between electrons and nuclei. EU 1.C: Elements display periodicity in their properties when the elements are organized according to increasing atomic number. Periodicity is a useful principle for understanding properties and predicting trends in properties. EU 1.D: Atoms are so small that they are difficult to study directly; atomic models are constructed to explain experimental data on collections of atoms. EU 1.E: Atoms are conserved in physical and chemical processes. Content Areas: Chemical Foundations Units Scientific method Significant figures Basics of systematic problem-solving Organization/classification of matter Atomic structure and periodicity Electromagnetic radiation Max Planck and quantum theory Atomic spectrum Mass spectrometry Spectroscopy Bohr model Quantum mechanical model Quantum numbers and electron orbitals Coulomb’s Law Periodic trends Atoms, Molecules, and Ions Dalton’s atomic theory Millikan’s oil experiment Rutherford’s metal foil experiment Timeline of milestones in the history of chemistry Atomic structure Types of bonds Chemical formulas for molecules Organization of the periodic table Naming compounds Big Idea 2: Chemical and physical properties of materials can be explained by the structure and arrangement of atoms, ions, or molecules and the forces between them. EU 2.A: Matter can be described by its physical properties. The physical properties of a substance generally depend on the spacing between the particles (atoms, molecules, ions) that make up the substance and the forces of attraction among them. EU 2.B: Forces of attraction between particles (including the noble gases and also different parts of some large molecules) are important in determining many macroscopic properties of a substance, including how the observable physical state changes with temperature. EU 2.C: The strong electrostatic forces of attraction holding atoms together in a unit are called chemical bonds. EU 2.D: The type of bonding in the solid state can be deduced from the properties of the solid state. Content Areas: Bonding Types of chemical bonds Electronegativity Bond polarity and dipole moments Ions: size and electron configuration London dispersion forces Lewis structures VSEPR Model Covalent Bonding: Orbitals Liquids and Solids Intermolecular forces The liquid state Structures and types of solids Structure and bonding in metals Vapor pressure and state changes Phase diagrams Gases Pressure Gas laws of Boyle, Charles, and Avogadro Ideal gas law Gas stoichiometry Dalton’s law Kinetic Molecular Theory Effusion/diffusion van der Waal’s equation Atmospheric chemistry Gas law practice problems Big Idea 3: Changes in matter involve the rearrangement and/or reorganization of atoms and/or the transfer of electrons. EU 3.A: Chemical changes are represented by a balanced chemical equation that identifies the ratios with which reactants react and products form. EU 3.B: Chemical reactions can be classified by considering what the reactants are, what the products are, or how they change from one into the other. Classes of chemical reactions include synthesis, decomposition, acid-base, and oxidation-reduction reactions. EU 3.C: Chemical and physical transformations may be observed in several ways and typically involve a change in energy. Content Areas: Stoichiometry Atomic and molar mass Percent composition of compounds and determining formulas for compounds Structure of chemical equations Balancing chemical equations Limiting reactant problems Percent yield Types of Chemical Reactions and Solution Chemistry All about water Aqueous solutions and electrolytes Types of reactions (precipitation, acid-base, oxidation-reduction) Half-cell reactions Salts in solution Redox reactions tips and practice problems Big Idea 4: Rates of chemical reactions are determined by details of the molecular collisions. EU 4.A: Reaction rates that depend on temperature and other environmental factors are determined by measuring changes in concentrations of reactants or products over time. EU 4.B: Elementary reactions are mediated by collisions between molecules. Only collisions having sufficient energy and proper relative orientation of reactants lead to products. EU 4.C: Many reactions proceed via a series of elementary reactions. EU 4.D: Reaction rates may be increased by the presence of a catalyst. Content Areas: Chemical Kinetics Reaction rates Rate laws Reaction mechanisms Catalysis Big Idea 5: The laws of thermodynamics describe the essential role of energy and explain and predict the direction of changes in matter. EU 5.A: Two systems with different temperatures that are in thermal contact will exchange energy. The quantity of thermal energy transferred from one system to another. EU 5.B: Energy is neither created nor destroyed, but only transformed from one form to another. EU 5.C: Breaking bonds requires energy, and making bonds releases energy. EU 5.D: Electrostatic forces exist between molecules as well as between atoms or ions, and breaking the resultant intermolecular attractions requires energy. EU 5.E: Chemical or physical processes are driven by a decrease in enthalpy or an increase in entropy, or both. Content Areas: Chemical Equilibrium Equilibrium conditions Equilibrium constants Solving equilibrium problems Le Chatelier’s principle Thermochemistry All about energy Enthalpy and calorimetry Hess’s Law Spontaneity, Entropy, and Free Energy Gibbs Free energy (G) Entropy changes in chemical reactions Free energy and chemical reactions Free energy ...and pressure ...and equilibrium ...and work The Nucleus Nuclear stability and radioactive decay Kinetics of radioactive decay Nuclear transformations Thermodynamic stability of the nucleus Nuclear fission and fusion Big Idea 6: Any bond or intermolecular attraction that can be formed can be broken. These two processes are in a dynamic competition, sensitive to initial conditions and external perturbations. EU 6.A: Chemical equilibrium is a dynamic, reversible state in which rates of opposing processes are equal. EU 6.B: Systems at equilibrium are responsive to external perturbations, with the response leading to a change in the composition of the system. EU 6.C: Chemical equilibrium plays an important role in acid-base chemistry and in solubility. EU 6.D: The equilibrium constant is related to temperature and the difference in Gibbs free energy between reactants and products. Content Areas: Properties of Solutions Solution composition Factors affecting solubility Vapor pressure of solutions Boiling point and freezing point variation Osmotic pressure Colloids Solubility and complex ion equilibria Solubility and solubility products Common Ion effects Precipitation Acids and Bases The pH scale Calculating pH Acid-base properties of salts and oxides Calculating acid strength Lewis Acid-Base Model Solving acid-base problems Acid-Base equilibria Buffered solutions Titration Acid-base indicators Tips for AP Chemistry Review Tip #1: Start From the Beginning Get your fundamentals straight before you try to do more complicated problems.On many AP Chemistry questions, you have to integrate a few pieces of essential knowledge and apply them to a given scenario.If you’re shaky on the foundational concept, you won’t be able to get to the correct answer.When you start studying, fill the gaps in your knowledge from earlier in the course first. Tip #2: Redo Problems You Didn’t Get the First Time If you can’t figure out a problem and have to look up the solution, don’t just read over what you were supposed to do and leave it at that.Review the steps you should have taken to get the correct answer, and then, without looking at them, try to resolve the problem. Learning by doing is very important in chemistry.Make sure you know why you’re solving the problem a certain way.You should also reinforce your knowledge by going through other similar problems. Tip #3: Do Lots of Free-Response Questions You might be tempted to stick with practicing multiple-choice questions because you can do a lot of them quickly and feel like you’ve made significant progress.However, it’s extremely important not to ignore the free-response section of the test in your studying if you want to do well.Free-response questions are a bigger challenge to your chemistry knowledge because you have to come up with the answers independently.Practicing themwill help you do better on the test as a whole.If you can answer free-response questions correctly on a consistent basis, that means you really know your stuff! This is what's gonna happen if you don't practice free-response questions! How to Review for AP Chemistry Your AP Chemistry review should revolve around detecting your areas of weakness and practicing relevant problems.Here are the steps you might go through: Step 1: Take and Score a Practice Test The first thing you should do is take a full practice test to assess how well you know the material.It’s more efficient just to study the concepts that you’re still shaky on rather than going back through all your notes for the course.Make sure you take the test with the same time constraints as the real exam, and don’t use a calculator on the multiple-choice questions. You should also circle any questions where you feel even a little unsure of the correct answer.You need to go over those concepts even if you end up getting the question right so you can be as comfortable as possible with all the content. When you’re done with the test, you can score it and set a goal for how much you want to improve. Step 2: Categorize Your Mistakes (and Any Other Questions That You Were Unsure About) Now that you’ve scored your test, go through your mistakes and lucky guesses, and sort them by topic area.This is the best way to get a clear picture of where you have the most significant issues with the content.Your list of mistakes will inform the rest of your review.I’d also recommend redoing problems that you missed to see if you can get to the correct answer. Step 3: Review Relevant Content If there was any essential background information on the test that you forgot, start by reviewing that content.The information that you learned in the first couple months of the course serves as a foundation for the rest of the class.After you feel confident with the basics, you can move onto studying higher-level topics. You might review your notes on how to solve certain types of problems or look back at the information in your textbook.You can also use an AP review book to study.Sometimes this is a better option because review books are specifically tailored to the test. Step 4: Do Practice Problems Reviewing content isn’t enough in chemistry. You need to know how to apply your knowledge to unfamiliar experimental scenarios on the test.Spend some time doing practice problems that pertain to each of your areas of weakness until you feel more comfortable with the subject matter. Step 5: Take Another Practice Test to See If You’ve Improved After you finish doing practice problems, try out your new skills on another practice test. You can score the new test and see whether you’re satisfied with your new (and hopefully improved) scores.You always have the option of repeating this process if there’s still room for growth.If you don’t see much improvement, you may have to go back and reevaluate your study methods. If there are some concepts that you’re having a really hard time wrapping your head around, I’d encourage you to ask your teacher or one of your classmates to help you understand the material better.Sometimes, if you can’t figure something out yourself, an alternative explanation is what you need for it to click. Here’s an approximate time breakdown for all of these steps: Take and score a practice test: 4 hours Categorize your mistakes: 1 hour Review content: 2 hours Do practice problems: 2 hours Take a second practice test: 4 hours Total time for one cycle: 13 hours Now it's time to set off on your own personal review journey. Good luck out there. No, I don't know why someone sculpted a ceramic frog with a rolling suitcase, but I have to assume that their life is much more interesting than mine. Conclusion The AP Chemistry exam covers a challenging set of concepts that require skills in math, factual recall, and analytical thinking. It's also one of the longest AP tests, lasting three hours and 15 minutes total. To recap, the types of questions on the test include: 60 multiple-choice questions (90 minutes) Seven free-response questions (105 minutes) made up of Three long response (10 points each) Four short response(four points each) AP Chemistry covers six main themes that encompass many more specific topics. These themes or "Big Ideas" are: The chemical elements are fundamental building materials of matter, and all matter can be understood in terms of arrangement of atoms. These atoms retain their identities in chemical reactions. Chemical and physical properties of materials can be explained by the structure and arrangement of atoms, ions, or molecules, and the forces between them. Changes in matter involve the rearrangement and/or reorganization of atoms and/or the transfer of electrons. Rates of chemical reactions are determined by details of the molecular collisions. The laws of thermodynamics describe the essential role of energy and explain and predict the direction of changes in matter. Any bond or intermolecular attraction that can be formed can be broken. These two processes are in a dynamic competition, sensitive to initial conditions and external perturbations. Some study tips that I would recommend implementing as you prepare for the exam include: Start with the basics Redo problems that you miss Practice free-response questions regularly When you study, you follow these steps for the best results: Take and score a practice test Categorize your mistakes Review content Do practice problems Take a second practice test If you keep up with your classwork throughout the year and adhere to the advice in this article, you'll have no problem doing well on the AP test! What's Next? If you're thinking about buying a review book to supplement your in-class notes, check out my list of the best AP Chemistry review books. Still planning out your schedule for the rest of high school? Read this guide for advice on which AP classes you should take based on your academic interests. Are you considering taking an online AP class that your high school doesn't offer? Learn more about online AP classes and whether they're worth it for you. 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Should I Get a Masters Degree 6 Factors to Consider

Should I Get a Master's Degree 6 Factors to Consider SAT / ACT Prep Online Guides and Tips Whether you've already graduated or are about to graduate from college, if you're asking yourself, "Should I get a master’s degree?" it’s time to dig deep and find the answer. A master's degree can be useful for particular careers- but it's also expensive and time-consuming. So is a master’s degree right for you? In this guide, we go over what a master's degree is, four key questions to ask yourself before you decide to get one, the pros and cons of getting one, and three tips to help you decide on the best master’s degree program for you.