Introduction To Stoichiometry

One of the most important parts of chemistry is stoichiometry. Stoichiometry is the study of the quantities of reactants and products in a chemical reaction. The word comes from the Greek  words:  stoicheion  (element) and  metron  (measure). Sometimes youll see stoichiometry covered by another name: mass relations. Its a more easily pronounced way of saying the same thing. Stoichiometry Basics Mass relations are based on three important laws. If you keep these laws in mind, youll be able to make valid predictions and calculations for a chemical reaction. Law of Conservation of Mass - mass of the products equals the mass of the reactantsLaw of Multiple Proportions - the mass of one element combines with a fixed mass of another element in a ratio of whole numbersLaw of Constant Composition - all samples of a given chemical compound have the same elemental composition Common Stoichiometry Concepts and Problems The quantities in stoichiometry problems  are expressed in atoms, grams, moles, and units of volume, which means you need to be comfortable with unit conversions and basic math. To work mass-mass relations, you need to know how to write and balance chemical equations.  Youll need a calculator and a periodic table. Heres information you need to understand before you start work with stoichiometry: How the Periodic Table WorksWhat a Mole IsUnit Conversions (Worked Examples)Convert Grams To Moles (Step By Step Instructions) A typical problem gives you an equation, asks you to balance it, and to determine the amount of reactant or product under certain conditions. For example, you may be given the following chemical equation: 2 A 2 B → 3 C and asked, if you have 15 grams of A, how much C can you expect from the reaction if it goes to completion? This would a be a mass-mass question. Other typical problem types are molar ratios, limiting reactant, and theoretical yield calculations. Why Stoichiometry Is Important You cant understand chemistry without grasping the basics of stoichiometry because it helps you predict how much of a reactant participates in a chemical reaction, how much product youll get, and how much reactant might be left over. Tutorials and Worked Example Problems From here, you can explore specific stoichiometry topics: How To Balance EquationsExample of Balancing an EquationUnderstanding Molar RatiosHow To Find the Limiting ReactantHow To Calculate Theoretical Yield Quiz Yourself Do you think you understand stoichiometry? Test yourself with this quick quiz.

Analysis Of The Movie The - 895 Words

Unexpected Niall sat on his couch wondering how everything went wrong. He should have stopped her from leaving. Was he really that desperate to force a liar to stay in love with him? His shaky hands feel around for the cool glass. The alcohol burns his lungs, but they dull the pain in his heart. â€Å"Did you start drinking without me?† That soft giggle rings out, causing Niall to turn with a smirk. â€Å"Hey, I’m glad you are finally here.† There she was, Nora, his best friend. She was tall, curvy, and she had these brown eyes that put Liam’s eyes to shame. â€Å"How bad was it?† Nora asks looking up from her beer bottle. â€Å"Well, she said that I cheated on her.† â€Å"Let me guess, it was with me?† Nora snorts the minute she sees Niall nod his head. Everyone thought that she was either cheating with Niall or he was cheating with her. They were just best friends that enjoyed a nice pint over some football. â€Å"Well, it is her lo ss.† â€Å"Yeah, we didn’t even have sex.† â€Å"Wow, she is really missing out.† Nora jokes. She had felt something for Niall a long time ago, but chalked it up to being lonely. Niall had always wondered what it was like to kiss his best friend, but fear kept him from getting near her. â€Å"Hey, do you remember that drinking game we used to play?† Niall asks really needing to get drunk fast. The game was really stupid, and an easy way to get drunk. Nora would start with a word, and they would keep saying words back and forth. The minute someone paused to think about the next wordShow MoreRelatedMovie Analysis : Movie 991 Words   |  4 Pages Film Analysis #3 The movie is an excellent portrayal of the current situation of our lifestyle in this generation. To be frank, it is a deep movie that has humor to help captivate and keep the attention of the audience drawn in. The movie starts of in the beginning with a man named Theodore and is life is currently empty of void of purpose and love. His life is mundane and he does not know what to do. There is flashbacks of what we can quickly determine what seemed like his former wife but theyRead MoreMovie Analysis : The Movie 902 Words   |  4 Pages(computer-generated imagery) effects and poor lighting. The solid cast and a promising new director unsuccessfully captured the overall message of the script. In a movie where â€Å"love† serves as the main motive behind the main characters’ actions, one can’t help but notice the movie itself felt cold and emotionless. The plot twist at the end of the movie not only clashed with the main character’s actions, but it also f ailed to muster up a significant emotional connection to the audience. TranscendenceRead MoreMovie Analysis : The Movie Crash 1662 Words   |  7 Pagesyou need to know in a short amount of time.When it comes to the textual analysis of it all it all depends on how the script is written not only that but how the script is played out in the film. In the textual analysis of a film you have to really pay attention to the environment during the film. You have to pay attention to the race in the film, the themes throughout the film and the gender roles played in the film. In the movie Crash we see many pairs where they each have their own different pointsRead MoreMovie Analysis : The Movie 1072 Words   |  5 Pagesarrival, she notices that her family maid is gone. After a multitude of events take place, she decides to write a book about the relationship between black maids and society. The movie shows how the town reacts to the release of the book and the lives of many of the black maids and the families they served. Throughout this movie, there are many stereotypes, images, and representations of gender, class, and race and demonstrate intersectionality. This paper, will outline these categories are portrayedRead MoreMovie Analysis : The Movie 1092 Words   |  5 PagesAimee’ Jo Bartolome Cmst 106; Section 53766 Summary The movie I chose to watch is â€Å"Clueless†. The film centers around a girl named Cher. She is a popular, attractive and wealthy teenage girl. She lives in a world of glamor and fashion. She lives in a Beverly Mansion with her widowed father. Dionne, Cher’s best friend, is equally rich and attractive. They both have a mindset that being fashionable and luxurious is considered high up the pedestal of popularity. She has an older ex-stepbrother namedRead MoreMovie Analysis: The Movie Anchorman1101 Words   |  5 PagesThe movie Anchorman: The Legend of Ron Burgundy is based in the 1970s. 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That included having an opportunity in employment, voting rights, having access to public facilities, education andRead MoreMovie Analysis : Movie Of A Film 2032 Words   |  9 Pagesbe able to come up with their own meaning instead of just giving it to them. They want the audience to think as they watch the movie, instead of sitting there blank. So what is an auteur? An auteur, defined from our book, is a â€Å"a director or other creative intelligence with a recognizable and distinctive style who is considered the prime ‘author’ of a film† (Film Analysis 1063). An auteur creates movies as a form of a rt to portray what they feel to people. They can portray feelings of politics, loveRead MoreMovie Analysis : The Movie Sicko 1559 Words   |  7 Pages1) Thoughts about overall movie I think Michael Moore’s movie Sicko educates audience on not to take too kindly, not to look too positive on notorious America’s health care system. I think it reveals that America’s health care is market-driven, profit-oriented health insurance and health providers where as in Canada, United Kingdom, Cuba, and France, health care is free. But, I also think that the movie overall looks too much negative aspects of USA health care system and too positive onRead MoreMovie Analysis : The Movie Aloha 1191 Words   |  5 PagesWe live in a white supremacist society. There is a system set in place that favors white people and it’s been this way since the founding of America. Racism in Hollywood is no different, since its conception Hollywood’s preference for white faces has been clear and continuous. From the 1915 film Birth of a Nation to Cameron Crowe’s 2015 film Aloha, Hollywood’s has proven time and time again that we are not liv ing in a post racial society. Racism within Hollywood can be seen in different forms, from

Compare or Contrast Public and Private Companies Free Essays

In today’s highly commercial world, one of the key objectives of starting a business is to make profit. While this might be true and important to every business, â€Å"most people believe that a business should not focus solely on profitability, but on the quality of products and services it offers to its customers†. This essay will discuss the various perspectives on the topic and will to a large extent agree with the view that businesses should not just focus on profit, by looking at customer desire for high quality product and their willingness to pay, then highlighting how focus on quality can lead to lower cost of product and profitability; as well as how quality influence organisation to be socially responsible, sustainable and profitable. We will write a custom essay sample on Compare or Contrast Public and Private Companies or any similar topic only for you Order Now First, a strong reason to concentrate on improving quality of product or services of an organisation is the fact that customers desires high quality good, and are willing to pay for value added. This was corroborated by (Nagar and Rajan 2001), who found out that â€Å"poor product quality reduces customer goodwill and loyalty which in turn affects future revenues as dissatisfied customers take their business elsewhere or pay less for the firm’s product. Such a product and the firm producing it acquire a bad reputation since poor product quality leaves a lasting impression on the consumer who perceives it as a low quality brand. In order for a product to be a perceived as a premium brand, a firm must continually improve on the quality of its products or services. A satisfied customer base lead to good brand perception and will open the door to numerous repeated purchases and referrals which will in turn help the firm to grow its market share, become more competitiveness and in crease its profitability. Focusing on quality significantly lowers cost of production at long run. Operations Management (Russell and Taylor, 2000) explains that, manufacturing of products to a high quality standard through implementation of quality management system have a large impact on overall quality cost reduction, it also argues that it saves time and money by reducing the amount of defective products that could result in wastes, thereby lowering significantly the costs of production, as well as cost to re-work defective products. Without a quality management system, poor-quality and defective products may finds their way into the market, through to the customer leading to warranty claims, product returns and in extreme litigation from product liability or injury to the customer. This may have a serious financial implication to the company as the costs associated with product recall and warranties would be enormous and in extreme case the damages imposed due to litigation could make the company insolvent, leading to a total collapse. However, an opposing view on this is that profit maximization is should be the main focus of the business as long as it pays its taxes and operates within the ambit of the law (Friedman, 1962). Certainly, this view may have worked for organisations in the 1800’s; it definitely does not apply in today’s modern and globalised world. The perspective is not only very narrow in view; it also fails to take into consideration other stakeholders who are affected by its activities of, but can also affect its existence. To these types of organisations, making ethical decisions is seen only from the viewpoint costly and profit. Organisations operating for profit alone are yet to appreciate the advantages of good corporate social responsibility and capitalize on it to grow their businesses in a sustainable and socially responsible manner. This drive for profit has led many to slash of employee’s benefits and salaries benefits; pollute the environment and cause permanent damage to the ecosystem all in bid to improve their bottom-line and many have earned a very bad reputation, suffer product boycott and tarnish their corporate image. In concluding this essay, as much as profit is very essential to the survival of a business, I want to agree that businesses should focus more on the improving quality of its products or services. This can be clearly seen to from the fact customer expects high quality at good value always, and because improving the quality will eventually bring down cost of production for a company. As well, quality focus drives a company to take ethical decisions and operate in a socially responsible and sustainable manner. It may be tempting for a business to sacrifice quality in order maximize its profit. However, it benefits will only be in the short term. A simple focus on profit maximization could destroy the continued existence of the business, not to mention the society in which it operates. A firm aiming extreme profit might purposefully cut corners during a project, knowing it gets the perks of a better quarter for now; knowing a future management team will have to deal with the damage of spill-induced lawsuit, fines, and a haul-up to it at the Criminal Court. How to cite Compare or Contrast Public and Private Companies, Essay examples

Romance free essay sample

Who would think that listening to hip hop music one would be influenced to live, think, and act a certain way? Joan Moorings Fly Girls, blotches, and hoes: Notes of a Hip Hop feminist, argues that the rampant sexism and machismo in hip hop music Is the fault of both African American men and women and damages the larger African community. She compares hip hop music to an abusive relationship. She states that hip hop music is the only way in which young black men are allowed to hide and express their pain. She believes that black men are engaged in war and, racism and white power structure have conditioned black men to believe the enemy is brown. She states that for most black men there is no trust, no community, and no family. She believes that hip hop is the mirror in which brothers see themselves. She states that black women are hurt when they hear black men calling them pitches and hoes. We will write a custom essay sample on Romance or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page She states that in the last thirty years the number of two-parent household has decreased from 70 to 38 percent. She says that the cause of death among black men ages fifteen to twenty-four Is homicide.The hip hop community creates sexism and schisms In the African American community because of the way hip hop artist dress, what they say and how they behave. Most hip hop performers dress In a very provocative way. Rap artist ill Kim want to the Grammar award wearing a purple sequence dress with one of her breast out covering the nipple with a piece of fabric. The men wear pants that expose their underwear and private area. The women wear short skirt and tight pants. They also wear half shirts with their bra showing and, cleavage hanging out. By dressing in a sexual way it makes the black community think that it is okay.In some of the hip hop songs the artist talks about expensive clothes. In the videos they show woman wearing tight clothes. The woman in these videos encourages young girls to dress like them. When these girls dress like the woman In the video they become poplar. While becoming poplar they gain friends and dress In style. Joan Morgan says weve all been recipients of the competitive way when Lung for male attention (5). This shows that woman dont have self-love for who they are. Most of hip hop songs encourage the use of improper English. Salt Shaker by Ill Jon amp: Stateside Boys states, Shasta crank on the floor wide openOcean Skeet so much they call her Billy Roll like an eighteen wheeler That hoe fine but this hoe a killer Shake it like a salt shaker She leaked, shes soaking wet In hip hop music slang are used. Some of the slang used are disks, hood rat, billing, blitz, silent, and grind. The slang that rappers use has become a language In the African American community. They use this slang because they dont want other races to know what they are talking about. Using slang make the black community more acceptable among there pears. With slang makes It easy for them to communicate with each other without sounding nerdy.By using improper English it Not only does improper English affect their ability to communicate but it will also affect the young children in school. Joan Morgan says, my feminism places the black community on its list of priorities (2). This shows that as a community things need to change. Hip hop music encourages deviant behavior. A deviant person behaves in a way that is not acceptable. Hip hop music encourages sex. In most hip hop music men talk about how big women breast and butt are. They also talk about going to bed with them. In the music videos there are scenes where there are men and women in bed half naked.