Law of Multiple Proportions Problem

Law of Multiple Proportions Problem This is a worked example of a chemistry problem using the law of multiple proportions. Two different compounds are formed by the elements carbon and oxygen. The first compound contains 42.9% by mass carbon and 57.1% by mass oxygen. The second compound contains 27.3% by mass carbon and 72.7% by mass oxygen. Show that the data are consistent with the law of multiple proportions. Solution The law of multiple proportions is the third postulate of Daltons atomic theory. It states that the masses of one element which combine with a fixed mass of the second element are in a ratio of whole numbers. Therefore, the masses of oxygen in the two compounds that combine with a fixed mass of carbon should be in a whole number ratio. In 100 grams of the first compound (100 is chosen to make calculations easier), there are 57.1 grams oxygen and 42.9 grams carbon. The mass of oxygen (O) per gram of carbon (C) is: 57.1 g O / 42.9 g C 1.33 g O per g C In the 100 grams of the second compound, there are 72.7 grams oxygen (O) and 27.3 grams carbon (C). The mass of oxygen per gram of carbon is: 72.7 g O / 27.3 g C 2.66 g O per g C Dividing the mass O per g C of the second (larger value) compound: 2.66 / 1.33 2 Which means that the masses of oxygen that combine with carbon are in a 2:1 ratio. The whole-number ratio is consistent with the law of multiple proportions. Solving Law of Multiple Proportions Problems While the ratio in this example problem worked out to be exactly 2:1, its more likely chemistry problems and real data will give you ratios that are close, but not whole numbers. If your ratio came out like 2.1:0.9, then youd know to round to the nearest whole number and work from there. If you got a ratio more like 2.5:0.5, then you could be pretty certain you had the ratio wrong (or your experimental data was spectacularly bad, which happens too). While 2:1 or 3:2 ratios are most common, you could get 7:5, for example, or other unusual combinations. The law works the same way when you work with compounds containing more than two elements. To make the calculation simple, choose a 100-gram sample (so youre dealing with percentages), and then divide the largest mass by the smallest mass. This isnt critically important- you can work with any of the numbers- but it helps to establish a pattern for solving this type of problem. The ratio wont always be obvious. It takes practice to recognize ratios. In the real world, the law of multiple proportions doesnt always hold. The bonds formed between atoms are more complex than what you learn about in a 101 chemistry class. Sometimes whole number ratios dont apply. In a classroom setting, you need to get whole numbers, but remember there may come a time when youll get a pesky 0.5 in there (and it will be correct).

5 Super Tips On How to Get Your Resume Noticed

5 Super Tips On How to Get Your Resume Noticed You’ve come of age in the era of social media. Which probably means you assume everything can be done online: networking, socializing, job applications. And that’s more or less true. But there’s one vestige of the old world that will still be crucial to you in finding yourself a satisfying job: a resume. Don’t be fooled into thinking you don’t need one. Everybody does. Do concern yourself with making sure your resume gets in the right hands. It doesn’t have to be perfect; you’ll likely tinker with it for the entirety of your career. But you need to start somewhere. Here are five tips for how to get your resume noticed and read, so you can get that job and get your start.1. Think like a computerYour cover letter and your interview need to be geared towards the human recruiters who’ll be reading it. Your resume, on the other hand, will probably be read first by a search engine. Keep that simple fact in mind and gear your document to get through the machines.2. OptimizePart of this strategy means using the right words to get through the computer programs that will sort your resume. Part of it is simply making sure you’re showing a hiring manager that you can do the job. Start by reverse-engineering the job description and peppering your resume with the keywords necessary to showcase your skills. You can also create a â€Å"core competencies† section at the top and listing your most valuable skills there. And if you have to cheat, and include keywords for skills you don’t quite have, you can try putting them in in white font, so computer searches will pick up on it, but human recruiters won’t see that text.3. Make it easyMake sure to get all the basics covered: school, major, GPA, objective. When writing your objective, err on the side of specifics. Don’t just say you want a great job doing great things; make sure to let the recruiter know you mean business. Be clear about th e location and the industry you’re looking for. Take the guess work out of it.4. Go electronic with your cover letterMore often than not, you’re going to need to email a cover letter rather than sending the traditional hard copy. Again, there’s no guarantee a human is going to see it. But you shouldn’t cut any corners all the same. Start with as personal an opening as possible- whether a friend referred you, or you have a mutual acquaintance, or you have a particular affinity for this particular position. Then use the rest of the message to contextualize the bullet points on your resume. Again, be as specific as possible.5. Think â€Å"means to an end†Your resume doesn’t have to be perfect. It doesn’t have to do everything. But it does need to be attention-grabbing. And it needs to present your brand clearly and effectively to the people who will hire you. Be honest and showcase your unique qualities and talents and you’ll do f ine.

Tau Beta Pi, Honor Society Membership Application Essay

Tau Beta Pi, Honor Society Membership Application - Essay Example This has also lead to growth in my career whereby I have been able to acquire a supervisory role within a period of six months an idea supported by Bureau of Labor Statistics (92). I am also a critical thinker and therefore I have managed to lead my team into making new discoveries and eventually patenting them. Besides many other qualities, I am competent and a hard worker who has never been caught in the web of incomplete projects or undone work. I have always wanted to be a great role model to many aspiring engineers. I believe TBP being the best engineering honor society (TBP p.1), is the best channel to achieve my dream. I would also wish to get a scholarship to further my studies and become a better professional. I will be of great benefit to TBP by contributing in innovation and hands-on activities of the society. I will also be actively involved in coming up with new ideas to keep the society’s quarterly magazine updated. Upon becoming a member of the institution, I will join the MindSET program and participate actively in its activities at various levels of study. I will encourage the students to follow the courageous spirit of the seven astronauts who died in their mission to discovery as documented by (Freiman & Neil,

Career Plan Essay Example | Topics and Well Written Essays - 750 words

Career Plan - Essay Example There is no better way to learn the ropes than being hands on. 2. Housekeeping Operations Manager, Compass Group – By the time I graduate from college, I would already have the needed 2-year job experience derived from Towne Park as a Guest Service Associated. By this time, I hope to also gain the trust and confidence of my seniors at Towne Park, enough for me to get their endorsement so that I can embark in a career that would allow me to practice my skills and knowledge. It will also help me enhance my management skills. This job should jumpstart a good and solid career and Tourism. Travel and Hospitality Management. B. HOSPITALITY CONCENTRATION I choose International Hospitality Operations Management as my field of concentration as this course would suit bests my personality and interests. I have always been a people-oriented person, interested in studying varied cultures in various settings. My interest in Travel and Tourism will take me to these countries and scenarios, t hereby enabling me not only to master my field of choice but also to practice it in such settings that are unique and with demands of their own. Nothing could be more challenging than adapting to the people, culture and market other than your own. Besides, the promise of being able to travel shall be an add on to the list of experiences that I anticipate to go through. C. INSIGHTS AND PLANS If there is anything that changed in my plans since I took this course, it would be that my desire to finish my course and embark on a career became more intense; much stronger than it was before. The drive to absorb all the concepts has increased, and I think I am more focused on the tasks and challenges ahead of me. There are now cleared visions of the future, with my better understanding of the opportunities unfolding even now as a student. At this point, I have also developed timelines for me to reach my goals after I finish this course. A timeline is very significant for me because that woul d be my gauge as to what my accomplishments already are and what are the needed steps for me to level up. My career goals have really remained the same, but the means to achieve them have significantly changed in such a way that I have become aware of the channels for me to reach them. D. MY GOALS Short term goals: 1. Gain basic experience in hospitality management by enlisting in a part time job/ apprenticeship in a local company. This would add substance to my resume by the time I graduate from college. 2. Enhance my management skills by enrolling in related short term training/ elective courses. This will also help me become an effective manager in the future. 3. Further enhance my communication skills by joining organizations and groups that would allow me to interact with other students, to help me verbalize my thoughts and communicate them effectively. I need to enhance my writing and speech communications skills and the best way to do this is to be with people who have same a spirations. Long Term Goals 1. Get a Masters Degree in Hospitality Management five to seven years from now. A Masters Degree from a good school would ensure me good job prospects and even better opportunities to get job promotions. It would serve as my stepping stone towards a higher career in hospitality management. Furthermore, the training that a Masters Degree offers, will allow me to keep abreast of emerging

The Baroque Period Essay -- Music Western Music Baroque Essays

The Baroque Period The Baroque Period (1600-1750) was mainly a period of newly discovered ideas. From major new innovations in science, to vivid changes in geography, people were exploring more of the world around them. The music of the baroque period was just as extreme as the new changes. Newly recognized composers such as Bach, Handel, Vivaldi, and Monteverdi were writing entirely new musical ideas and giving a chance for new voices to be heard that were normally not thought of sounds. Their musical legacy is still recognized today, and is a treasured discovery of outstanding compositions being reiterated with every performance of them. Baroque which came from the French word barroque and the Portuguese word barroco originally meant deformed and misshaped. In a sense baroque is an appropriate term to describe this new for of ideas in time. On the other hand, no real word can describe the richness of this time period. Baroque music, just like any other music, reflects the time period that it was written in. The baroque era opened with the Thirty Years War, which included the siege of Vienna by the Turks in 1683, and ended with the development of independent nation states throughout Europe. The face of Europe was completely changed during the baroque period. Most music in the baroque era ended up being predominantly vocal, and its biggest factors were the opera and its styles. Most composers of the baroque period shared the same ideas of how their music should...

With the High Turnover Which Characteristic Employment

The highly turnover rate of employees in tourism, hospitality and event organisation, which is a serious issue concerned by every company, is defined as company’s employees leave their job at a relatively high rate in certain industry. High turnover can result from various numbers of issues of employee which may ignore or neglect by certain company in a certain extract (e. g. dissatisfaction of work, overload work, emergence of competitors, poor management etc).But what is the main reason that caused high turnover in certain industry is that organisations fail to realize the importance of engaging and motivating employees. They tend to assumed that this action is such a waste of time and it is more important to focus on employee’s performance. There are few factors that caused high turnover which can be listed out. Firstly, over burden of work may causes dissatisfaction among employees. They tend to think that they are doing a double or even triple job, but they only ge t a single salary which is underpaid.Moreover, it is common for a professional to know the benefits of equivalent positions. Thus, to fulfil the needs and wants of an individual, one will look for a job with a better salary and consumption and as a result leave the current organisation. Besides that, for an extended of time, some may feel tired of working in a boring and uninspiring job positions which would lead them to change job which is more attractive and challenging compare to the previous organisation.

The Impact Of Television On The Moral Development Of Young...

The Impact of Television on the Moral Development of Young Adults â€Å"Tweens surveyed almost four and one-half hours of screen media viewing each day, which include watching TV videos, DVDs, and movies. TV-watching dominated, with this age group viewing approximately three and one-quarter hours of TV daily† (Azzam 92). Adolescents these days are surrounded by constant exposure to an outsized variety of unhealthy and unsafe ideas through programs on the television. These potentially destructive displays shown on television are reflected and mirrored in the behaviors of many adolescents, and as well as influencing actions, the presentations also present the youth of today with unrealistic beliefs and ideas about the way they should behave and think. Several of the television programs being shown on popular broadcasting stations such as VH1 and MTV illustrate dominant messages that imply that alcohol and drug use have no or few consequences, that sex is not meant to be a mean ingful experience rather just something to do for fun, and that there is a certain body image that you must maintain in order to be considered beautiful in today’s society. Adolescents may or may not realize they are imitating the actions and behaviors of characters they witness on their favorite television shows and that these such actions of characters or celebrities they are witnessing on their favorite television shows like MTV’s 16 and Pregnant, Skins, and The Real World all provide to the youngShow MoreRelatedTV To Blame For Rising Violence Essay examples932 Words   |  4 Pagespolice chief an article taken from the Times on 28th June 2002. 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