freshman spring

freshman spring Is it already the seventh week of the semester? To be honest, Ive been chugging work from such a consistent, ever-so-slightly-bulging firehose for so long that this fact surprises me. Its almost like I hadnt noticed the time go by, which isnt entirely true: I guess what I mean to say is that Ive never really been able to take a break yet this semester. A true break. A break where, after the fourth midterm youve taken in two days, you celebrate by declaring the night off from work, and you wont have a new pile of things to do waiting the next morning as a consequence. Spring break please come soon. Id also like to opine that although MIT is indubitably hard, much of the difficulty is self-prescribed: it is often the case that students here take on more classes, more committments, more work than is expected of them. There are always exceptional people here, people that I admire and deeply respect, yet I always have to remind myself that MIT isnt a race, and there isnt anything wrong with going at your own pace, and that its okay to slow down when the burden becomes infeasibly heavy. I keep these thoughts close to my heart more than ever lately: I tread a very fine line. My committments, classes, psets, and essays are modeled as drived sinusoidal inputs throughout the week in the differential equation, the system that is my life, and I am oh so critically damped, in danger of tilting towards instability at any moment. Or, I suppose, towards an overdamped stability, if youre a glass-half-full kind of person. (Unpopular opinion: 18.03, Differential Equations, is an interesting class and I think its a really useful class to take.) Speaking of classes, have a schedule: 6.01 (Intro to EECS via Robot Sensing) is an amazing class! The labs are extremely fun: last week we used potentiometers, op-amps, and other components to make a robot car move forward, move backward, and turn using a breadboard as a remote control. A few weeks ago, we created LEGOLANCE, PRINCE OF MIRKWOOD by attaching a Lego lance to the front of the car and successfully won a joust against a bulls-eye target that never stood a chance. The midterms are challenging, and the class certainly isnt easy, but the staff is extremely supportive and office hours are frequent and rewarding. breadboarding is cool~ 6.042 (Math for Computer Science) is a really interesting class. I guess the closest synonym for it is discrete math: topics include proofs, cardinality, set theory, graph theory, number theory, probability, and random variables. This semester, 6.042 is in TEAL format, which for 6.042 means that there are no formal lectures and class time is entirely devoted to solving problems on whiteboards with a group ot 5-7 other people. Ill admit that I wasnt really into the format at first: I much prefer note-taking, lecture-style classes. But this class has grown on me, and the material that 6.042 teaches critical thinking, proofs, logic, reasoning is actually quite suited for TEAL. 8.02 (Electricity and Magnetism) is a GIR, and although I like the physics, its also really hard and Im kind of bad at it. :( Gauss law is nice. 18.03 (Differential Equations) might as well be 18.06 with all the linear algebra weve been doing: in fact, the title of our last lecture was literally Introduction to Linear Algebra. shrug  Seriously though, its a good class, although this statement is kind of debated among my friends. Complex numbers are pretty. 24.900 (Intro to Linguistics) Oh my god linguistics is SO COOL. I could probably go on for hours about it. Did you know that English has about 14 different vowels and only five ways to express them? Did you also know that the upside-down e symbol that you see sometimes in online dictionaries for pronunciations is called a schwa? I sure didnt before taking this class. Also, we had to learn most of the IPA (International Phonetic Alphabet) for a quiz last week, and that was kind of brutal and also really interesting at the same time. Maybe one day, Ill write a blog post exclusively in IPA. Maybe that would be silly. (im uh also not sure if people would let me do that _ i would love to though!) Related to linguistics, I recently started a UROP that has to do with the rhythm of speech. I might have a more detailed blog post about the results of this project a month or two down the road~ Im currently finishing up beginner archery, and will start intermediate archery soon. Similar to pistol, which I took last semester, archery is a really good activity for meditation. I get to aim at one simple thing, the bulls-eye, and get to ignore everything else, which lately is something thats hard to come by. I also did a hall exchange with my friend Jessica T. 20 from Next House for a week some time ago: well be doing a co-blog post thingy about it down the road when were not hosed. Im not sure how to end this blog post, so have a wholesome meme: Post Tagged #18.03 Differential Equations #24.900 Intro to Linguistics #6.01 #6.042 #8.02 Physics II: Electricity and Magnetism #Archery #PE

Legalization Of Marijuana On The Economy - 1927 Words

Chelsea Ballew Mr. Harrington Writ 101, 72 31 March 2015 Legalization of Marijuana on the economy If one were told that the United States had all of the answers to their economic issues growing within their country wouldn’t people take advantage of it? Even if the solution was currently considered as an illegal substance. George Shaw stated, â€Å"If history repeats itself, and the unexpected always happens, how incapable must Man be of learning from experience. Mr. Shaw’s wisdom particularly applies to the current debate on the legalization of cannabis, and if it should be legal state or nationwide. The present-day prohibition on marijuana is not any different than the past prohibition on alcohol in the roaring 20’s. The legalization of marijuana, similar to alcohol not only means more money for the government, but also more revenue, jobs, and savings. The debate can be tough to follow with all of the political jargon. Americans must keep in mind that is substantial to find a solution to the lingering question, should marijuana be legalized? It is vital for the United States to end the expensive and uneconomical prohibition. Besides the infinite reasons for legalization such as ending panic over drugs, lowering crime rate and ending drug-related pollution there is one clear motive for legalization, the money. The Huffington Post reported â€Å"The government would save an estimated $13.7 billion on prohibition enforcement costs and tax revenue by legalizing marijuana.† How is itShow MoreRelatedShould Marijuana Be Legalized? Essay1223 Words   |  5 Pagesthat the marijuana industry has had on the economies of the states which have legalized recreational marijuana use for consumers over the age of 21. Many predictions were made referring to the outcome of marijuana legalization, however, most predictions made did not foretell the actual outcome. The act of legalization in the state of Colorado has yielded many advantages in the field of marketing. With these advantages, however, come many disadvantages. This study will identify how marijuana legalizationRead MoreWhy Not Legalize Marijuana? Essay1173 Words   |  5 PagesMarijuana should be legalized for both recreational and medicinal use because the US economy can reap significant benefits from legalization as well as create an influx of jobs and also to reduce street and gang disputes relating to marijuana. Also, marijuana should be legalized because it has been dealt an unfair hand by society and is justifiably safer than most know it to be. First, marijuana should be legalized in the US for both recreational and medicinal purposes because there is a very substantialRead MoreArgumentative Essay On Legalization Of Marijuana901 Words   |  4 PagesThe legalization of Marijuana is a topic that has been discussed for many years. It has had many support as well as opposition. This topic has caused a lot of controversy over the years. In today’s society the amount of marijuana or cannabis that is being consumed is, for the most part, consumed by te ens and adults. Although marijuana is an illegal drug, that does not stop people from getting a hold of it. The use of marijuana can be for many reasons such as, socializing, obtaining a high, escapingRead MoreEssay on Legalization of Marijuana610 Words   |  3 PagesLegalization of Marijuana One debate that keeps coming up time and again is the topic of the legalization of marijuana. Marijuana is the most widely used illegal drug. Nearly one in three teenagers have at least tried marijuana by the time they graduate high school. It is also gets the most publicity for its legalization. Over thirty pro-legalization organizations have been displayed on the Internet alone. The legalization of marijuana , although popular by todays drug culture, would be aRead MoreShould Marijuana Be Legalized For The Best Of Society?1742 Words   |  7 PagesMarijuana is one of the most controversial discussions to consider in various countries due to the numerous debates between citizens to legalize or criminalize the drug for the best of society. In countries such as Colombia, Netherlands, and various states in United States (Colorado, Washington, and Oregon), marijuana is legalized for recreational and medical purposes, which is obtainable to all citizens. However, in countries such as Canada, marijuana remains illegal for recreational use, whichRead MoreThe Legalization Of Marijuana For Industrial Use940 Words   |  4 Pagesthe thought of cannabis but the legalization of marijuana for industrial use would create jobs, benefit the economy, and contribute to the environment through a number of uses from the plant. A good choice would be to crack down on the sales of marijuana, but the smarter choice would be to legalize! Many jobs woul d be created for the growth of cannabis. In order for the US to grow and sell marijuana, taxes would be added, therefore creating more money for the economy just by legalizing the growth ofRead MoreEssay about The Benefits of Legalizing Marijuana1494 Words   |  6 PagesLegalization of Marijuana Despite late controversy regarding weed or as most professionals call it now medical marijuana, I have a strong opinion regarding given substance. I think marijuana should be legal but Im going to discuss this matter more in my essay. Some topics I would like to discuss would be: should it be legal, is it beneficial for medical purposes, economy, job growth and reducing crime rates. Background Industrial Hemp Plant(â€Å"Hemp, Industrial Hemp field†) For most of humanRead MoreShould Marijuana Be Legalized?971 Words   |  4 Pagesyear to fight a senseless war on marijuana. According to the United Nation over 94 million people in the United States have admitted to using marijuana at least once. This number is not shocking, because marijuana is a safe and harmless drug. Marijuana is used for several different medical purposes. It is also healthier than already legalized drugs. The prohibition on marijuana is failing, there is no valid evidence that it decreases drug use. People view marijuana in a negative light, because ofRead MoreShould Marijuana Be Legalized? Essay1372 Words   |  6 PagesLegalization of Weed Growing up, everyone is told that, â€Å"Drugs are bad for you,† time and time again. Now as a kid you don’t really understand the reasoning behind it, but you listen to your authority figure regardless. I remember being told this my entire life and even to this very day. But as I got older I realized that people would still use drugs even though it’s illegal. I could never understand why someone would go against the law and jeopardize their life just to use drugs? The drug thatRead MoreEssay on What If Marijuana Became Legal?623 Words   |  3 Pages Legalizing medical marijuana would reduce crime rates all across the United States. Marijuana is a widely used drug and a lot of crime revolves around it. A lot of money is spent on marijuana, whether it is at a dispensary in Colorado or police officers spending large amounts of money on drug busts. Police officers want a strong relationship with the community they serve. Police want to catch real criminals who hurt real victims. It would save departments a lot of money because they are wasting

Advanced Placement Sonnet Essay Question Samples - What Is It?

Advanced Placement Sonnet Essay Question Samples - What Is It? The 30-Second Trick for Advanced Placement Sonnet Essay Question Samples Although there's no rigid formula for writing a great introduction but we can realize that there are many strategies and guidelines we can readily adopt to generate quality success. It ought to be accurate, include all of the info you require, and provide you with an opportunity to record your own thoughts and thoughts on the material you're reading as you cooperate. Our customer support will gladly tell you whether there are any special offers at the present time, along with make sure you are getting the very best service our business can deliver. Although his behavior isn't seriously disruptive, it's annoying. If you're not an essay English writer, don't get frustrated. This title will get someone who wishes to learn. Learn more about the way the essay is scored. You must decide what you wish to write in your essay. The essay offers you a chance to reveal how effectively you may read and comprehend a passage and compose an essay analyzing the passage. Every essay should have a thesis that you wish to develop and support. The College Board does not have any control over their content and can't vouch for accuracy. Thus, State University isn't only the ideal spot for me, it is the sole location for me. Nursing is frequently a springboard to numerous different positions. Nursing today is a lot more than simply working at the bedside. Utilise the assistance of our service and don't fret about how you complete the school. Nevertheless the challenging work should not stop you from writing. All you will need is to request research paper help written by means of a specialist in your academic field. Discussion Essay Tips Some individuals believe that environmental problems should be solved on an international scale even though others believe it is preferable to address them nationally. The Advanced Placement Sonnet Essay Question Samples Trap You won't make the error of writing something in your essay that you believe you have thought of yourself, but is in reality something you're remembering from a book word-for-word. You might also want to suggest more research or comment on things that it wasn't possible that you discuss in the paper. A Description or Explanation'' essay will request that you describe a specific sample of person especially the fantastic qualities of someone or explain something on earth. E ach and each time you've got an English essay writing project, you're welcome to speak to us and we're going to assist you. Introductory paragraphs should not ever be too long. Punctuation such as commas and colans at the conclusion of each line serve to present a pause in the stream of the sonnet instead of the use of a full-stop. This kind of question is quite much like the Agree or Disagree question. There are some critical reasons for why it is preferable to type out sources word for word in your research as opposed to only take notes. Nowadays you have the capacity to choose from an actual top list! Devote adequate quantity of time to correct errors together with grammar mistakes in writing. He suits now along with ever. The absolute most important task is to deal with your essay questions correctly by utilizing the correct style, the proper grammar and robust supporting documents. It's easy to observe how those lenses would produce the exam impossible to standardize and reliably assess. You simply need to understand how to write for the test. Can't be utilized in conjunction with other promotional codes. As soon as it's always best to confirm the test needs of the schools you're applying to, you may also choose which tests to take based on your specific strengths and weaknesses or individual preferences. Make the most of our handy guide as it is exceptionally formulated to breathe life into your upcoming essay. This example demonstrates that even for an engineer with years of experience in the specialty, the basics of private essay writing remain the exact same. Subject tests are ideal for focusing on your special talents, and a few schools recommend a minumum of one or two, therefore it's a great idea to work out whether they may be appropriate for you.

Nutritional Analysis Paper Free Essays

WELLNESS-FOCUS NUTRITION Diet Analysis Paper Being an insulin dependent diabetic with Celiacs Disease has played the main role in dictating my eating patterns for the last six years. I walk a fine line of balancing blood glucose levels with diet and exercise. Many of the foods I eat are simply because I have to follow a gluten free diet to manage my Celiacs Disease. We will write a custom essay sample on Nutritional Analysis Paper or any similar topic only for you Order Now With all of the emerging publicity of gluten free diets people assume that eating gluten free is a healthy, weight friendly, approach to eating. I find that a naturally occurring gluten free diet lives up to many of those expectations, however when certain foods are replaced with a formulated gluten free version it then becomes a different story. When gluten free adaptations of grains in breads, pastas, cereals, etc. are added into my diet I find myself eating a much higher amount of carbohydrates and calories from starch. Many of the gluten free versions of whole grains are very dense in carbohydrates. The reason behind the heightened calories and carbohydrates is because it usually takes multiple types of gluten free flours mixed together to substitute for one non gluten free all purpose flour. I anticipate my carbohydrate intake will be on the elevated side in the initial three day data, but I am consciously mindful to try to avoid too many gluten free replacements and instead opt for foods that are naturally gluten free. Other influences on my food choices would include my on the go lifestyle and my Diabetes. I have been a type one insulin dependent diabetic for twenty seven years. Over the last three decades the guidelines for a diabetics diet and target blood glucose range have changed drastically. Target blood glucose levels for â€Å"good† blood sugar control was 180 when I was first diagnosed. At the age of 12 I remember 150 being the upper limit. Now, at the age of 29, 120 is considered the highest â€Å"good† limit. These numbers hold relevance to me because they are how I determine my insulin intake and diet adjustments. I have to count my carbohydrates in order to determine how much humalog to distribute. For every ten carbohydrates I consume I require one unit of insulin. These numbers all influence my food and beverage intake. My schedule is also a deciding factor of my diet. I begin my day at five a. m. every day and am headed to the gym by five thirty every morning. From there I head to school, where I am a full time student, until approximately 4 p. m. . I then drive to my job teaching competitive dance teams in Oxford until 9 p. m. . I get home, in Rochester, around 9:30 p. m. and begin my homework. My weekends are filled with competitions many times, which leaves me with very little time to grocery shop and prepare my meals in advance. I try the best I can to prepare my foods at home, but occasionally do resort to microwavable gluten free foods or salads from drive through windows. My expectations for my initial seven day data are that my levels will show higher carbohydrates, but an adequate amount of vitamins and minerals. I do not anticipate my fat intake to be too high because I generally gravitate towards healthy fats. Fiber is definitely well incorporated in my diet through the variety of fruits, vegetables and skin on potatoes I eat. My vitamin D levels via food consumption may be low, but I am not concerned with it because I have been on a Dr. rescribed supplement for six years due to my Celiacs Disease. Based on the data collected in the first seven days of data recording , two of my initial hypothesis are correct. I have an elevated level of grains intake , which is shown on the my plate chart, and an extremely low level of vitamin D. During my second phase of dieting I will definitely be cautious of my s tarch intake in an attempt to lower it below the 112% of the recommended daily intake. A few things I am surprised to discover are that my vegetable intake and dairy intake are much lower than my recommended daily intake . I am also disappointed to find out that my dietary fiber, potassium and vitamin E levels are much lower than expected. Vitamins E and C work to stabilize free radicals and repair injury to the cell membrane and tissues. Thankfully I am consuming three times the amount of vitamin C recommended, however my vitamin E level is at a mere 17% of what it should be. Free radical damage could become quite significant if I continue to be so deficient in vitamin E. Good sources of vitamin E to incorporate into my diet are nuts, more spinach, peanut butter and avocado. Potassium is an essential electrolyte that affects the body’s fluid balances, nerve transmissions and muscle contractions. During dance I have noticed that lately, while pointing my toes, I have been experiencing foot cramping more times than not. The low levels of potassium I am consuming may be playing a role in that. Adding more fruits and vegetables to my diet is going to increase my vegetable intake as well as increase my potassium and fiber levels. Fiber is important in aiding the digestive tract and supporting regular bowel movements. Soluble fiber is known to lower both blood cholesterol and glucose levels. Additionally to fruits and vegetables, adding more legumes to my diet is a great way to get more fiber. Upon completion of the second phase of data entry I had definitely made some effective changes. I increased my vegetable intake from 68% to 209% by adding vegetables in as snacks and incorporating them into as many meals as possible. The most notable effects of eating more vegetables are that my fiber level increased from a 50% to a 96% and my vitamin E from a 24% to a 35%. My folate levels went from a 48% to a 77% and my vitamin A levels went from a 82% to a 230%, both can be attributed to the consumption of more fruits and vegetables. I increased all of my B vitamins except for Thiamin, which respectively stayed the same. By adding more dairy through milk, cheese and yogurt I increased my calcium from a 70% to a 116%. My bones will surely thank me for that. Sodium increased from a 87% to a 128%. Ironically I increased my carbohydrate intake from a 55% to a 72%, yet reduced my grain intake from a 68% to a 52%. Adding a larger variety of fruits, dairy and vegetables to my diet was the key to lowering my grain intake while raising my carbohydrate intake. The grain intake on the my plate report is quite a fluctuation between the first and second phases, but I believe with continued monitoring and experimenting with interchanging foods that that can be balanced out. Another notable change is that I cut my fats by nearly half by eating more vegetables and low fat dairy items. I did increase my fruit intake slightly from a 74% to a 83%, but I think that overall I do consume an adequate amount of fruit regularly. My recommended daily caloric intake is 1,858. 11, however I fell short in both phases. I am comfortable at a 1200 calorie diet. I was full every day and could not eat any more without becoming uncomfortably full. Overall this diet analysis was very informative to what changes I can make in my life for a more balanced diet that is high in nutrients, vitamins and minerals. It was eye opening what positive changes adding more variety to my diet can actually make. My stress levels do fluctuate daily, however one stress factor that remains constant and I would rate at a 4 is my frustration with my lack of losing weight while giving a solid 100% effort over the last three months. I did not have any higher than usual stressful days. Mondays are always a higher stress day, simply because I have a more hectic schedule. I teach the largest number of children ages 7-18 dance on Mondays and having that many children for three hours does wear on my patience. I teach a total of 52 children that are split into three separate classes on Mondays. My schedule on Mondays, Tuesdays and Wednesdays has me up at 5a. m. , out the door at 5:45am and not returning home until 9 at night. I go directly from the gym to school to work on Monday, Tuesday and Wednesdays. That being said, I would rate my stress levels on Monday a 6, Tuesday a 5 and Wednesday a 4. Planning and packing meals, change of clothes, choreography, homework and medical supplies ahead of time makes a tremendous difference in how smoothly those three days run. My diabetes is a contributor to my daily stress factor. I maintain some sort of stress on a daily basis that is based around my blood sugar levels, balancing them and the effect a high or low has on my body both physically and mentally. Every single day, regardless of other influences or happenings, my stress is maintained at a level 2 strictly because of my health management. With my activity level being so high and my schedule being so demanding, I know that averaging four hours of sleep a night is not healthy or ideal. I will try to aim for seven hours of sleep a night in order to give my body the chance to rest and recuperate that it needs. My ability to focus and process information at an optimal level should also improve with more sound sleep. Stress levels may not diminish, but they will more than likely lower for me with improved sleeping patterns. I feel confident in being able to recognize unhealthy patterns and rectify them the best I can while moving towards a healthier future. How to cite Nutritional Analysis Paper, Papers

Ultraviolet and Nivea free essay sample

In 1911 a German consumer company named, Beiersdorf brought out the now the very famous Nivea cream. Nivea Cream was the first true cosmetic moisturiser to be released upon the market, and is still Nivea’s signature product. Since then, the company has grown to be one of the largest skin care brands throughout the world, selling a range of products in over 150 countries. However, to meet the ever evolving customer needs and to further penetrate into the personal care and cosmetics market; Nivea extended its product range to include: body moisturisers , sun care, Nivea for men, hair care, and deodorants to name but a few. This strong global presence, along with continuous innovation and product development has enabled the brands in the Nivea portfolio to effectively compete among the global leaders in the personal care market. Macro-Environmental and PEST Analysis Introduction The macro-environmental analysis is going to be based on Nivea sun care, as this product is aimed towards the greatest target market as its geographical position can now be seen in many shops worldwide. We will write a custom essay sample on Ultraviolet and Nivea or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page To gain a full understanding into the brand Nivea, a PEST analysis is going to be conducted, this will show an in depth explanation of some major factors which have occurred over the past few years. Whilst researching on the Mintel Oxygen website, one statistic which was very significant in the overall sale figures of Nivea was; â€Å"Poor summer weather has contributed to the 2% decline in total Nivea sun care value sales between 2009 and 2011. According to Cancer Research UK, people still need UV protection when the sky is cloudy as clouds are not a good shield against UV radiation.

FORP News Letter †November 13 †2005

FORP News Letter – November 13 – 2005 Free Online Research Papers FORP News Letter November 13 2005 As of writing this letter we have been online 12 weeks, 11 hours, and 59 min. Thank you to everyone who is contributing to make this an excellent resource and a growing community of students seeking out examples of high quality work. Also, a special thanks to keto and drgold for helping us out with some bug issues relating to the sites functionality. If not for you guys we would be still doing things the hard way! We are currently at 562 papers! 500 papers was a major goal for me when I first thought of this site. I never thought it would take off this fast with so many people contributing. There are still a fair number of people contributing as anonymous users and that is ok but I would hope eventually they sign up for accounts so that we can give them credit for their efforts. Thanks again to everyone who is making this site happen and I hope we continue to grow over the next 3 months. Admin Research Papers on FORP News Letter - November 13 - 2005Hip-Hop is ArtThe Project Managment Office SystemLifes What IfsThe Hockey GameStandardized TestingDefinition of Export QuotasRelationship between Media Coverage and Social andThe Relationship Between Delinquency and Drug UseInfluences of Socio-Economic Status of Married MalesMarketing of Lifeboy Soap A Unilever Product

3 Steps for Balancing Chemical Equations

3 Steps for Balancing Chemical Equations A chemical equation describes what happens in a chemical reaction. The equation identifies the reactants (starting materials) and products (resulting substances), the formulas of the participants, the phases of the participants (solid, liquid, gas), the direction of the chemical reaction, and the amount of each substance. Chemical equations are balanced for mass and charge, meaning the number and type of atoms on the left side of the arrow is the same as the number of type of atoms on the right side of the arrow. The overall electrical charge on the left side of the equation is the same as the overall charge on the right side of the equation. In the beginning, its important to first learn how to balance equations for mass. Balancing a chemical equation refers to establishing the mathematical relationship between the quantity of reactants and products. The quantities are expressed as grams or moles. It takes practice to be able to write balanced equations. There are essentially three steps to the process. 3 Steps for Balancing Chemical Equations 1) Write the unbalanced equation. Chemical formulas of reactants are listed on the lefthand side of the equation.Products are listed on the righthand side of the equation.Reactants and products are separated by putting an arrow between them to show the direction of the reaction. Reactions at equilibrium will have arrows facing both directions.Use the one- and two-letter element symbols to identify elements.When writing a compound symbol, the cation in the compound (positive charge) is listed before the anion (negative charge). For example, table salt is written as NaCl and not ClNa. 2) Balance the equation. Apply the Law of Conservation of Mass to get the same number of atoms of every element on each side of the equation. Tip: Start by balancing an element that appears in only one reactant and product.Once one element is balanced, proceed to balance another, and another until all elements are balanced.Balance chemical formulas by placing coefficients in front of them. Do not add subscripts, because this will change the formulas. 3) Indicate the states of matter of the reactants and products. Use (g) for gaseous substances.Use (s) for solids.Use (l) for liquids.Use (aq) for species in solution in water.Generally, there isnt a space between the compound and the state of matter.Write the state of matter immediately following the formula of the substance it describes. Balancing Equation: Worked Example Problem Tin oxide is heated with hydrogen gas to form tin metal and water vapor. Write the balanced equation that describes this reaction. 1) Write the unbalanced equation. SnO2 H2 → Sn H2O Refer to Table of Common Polyatomic Ions and Formulas of Ionic Compounds if you have trouble writing the chemical formulas of the products and reactants. 2) Balance the equation. Look at the equation and see which elements are not balanced. In this case, there are two oxygen atoms on the lefthand side of the equation and only one on the righthand side. Correct this by putting a coefficient of 2 in front of water: SnO2 H2 → Sn 2 H2O This puts the hydrogen atoms out of balance. Now there are two hydrogen atoms on the left and four hydrogen atoms on the right. To get four hydrogen atoms on the right, add a coefficient of 2 for the hydrogen gas. The coefficient is a number that goes in front of a chemical formula. Remember, coefficients are multipliers, so if we write 2 H2O it denotes 2x24 hydrogen atoms and 2x12 oxygen atoms. SnO2 2 H2 → Sn 2 H2O The equation is now balanced. Be sure to double-check your math! Each side of the equation has 1 atom of Sn, 2 atoms of O, and 4 atoms of H. 3) Indicate the physical states of the reactants and products. To do this, you need to be familiar with the properties of various compounds or you need to be told what the phases are for the chemicals in the reaction. Oxides are solids, hydrogen forms a diatomic gas, tin is a solid, and the term water vapor indicates that water is in the gas phase: SnO2(s) 2 H2(g) → Sn(s) 2 H2O(g) This is the balanced equation for the reaction. Be sure to check your work! Remember Conservation of Mass requires the equation to have the same number of atoms of each element on both sides of the equation. Multiply the coefficient (number in front) times the subscript (number below an element symbol)Â  for each atom. For this equation, both sides of the equation contain: 1 Sn atom2 O atoms4 H atoms If youd like more practice, review another example of balancing equations or try some worksheets. If you think youre ready, try a quiz to see if you can balance chemical equations. Balance Equations With Mass and Charge Some chemical reactions involve ions, so you need to balance them for charge as well as mass. Learn how to balance ionic equations and redox (oxidation-reduction) reactions. Similar steps are involved.