LIMITING REAGENT Practice Problems 1. At high temperatures‚ sulfur combines with iron to form the brown-black iron (II) sulfide: Fe (s) + S (l) ( FeS (s) In one experiment‚ 7.62 g of Fe are allowed to react with 8.67 g of S. a. What is the limiting reagent‚ and what is the reactant in excess? b. Calculate the mass of FeS formed. 2. Arcylonitrile‚ C3H3N‚ is the starting material for the production of a kind of synthetic fiber acrylics) and can be made from
Premium Oxygen Chemical reaction Chemistry
“Use of Biuret Reagent to Test for Proteins In Food” Cindy Zhou Introduction Protein is a series of amino acids that are connected together by peptide bond. The bond is located between the end of previous amino acid‚ which is the carboxyl group‚ and the head of next amino acid‚ which is a amino group. The Biuret reagent is a solution of copper sulfate and potassium hydroxide. When peptide bond are presented‚ the copper (II) will interact with them (MadSci Network: General Biology). It is
Premium Amino acid Protein
Quiz Top of Form Previous PageNext PagePage 1 of 4 Note: It is recommended that you save your response as you complete each question. Question 1 (2.7 points) The combustion of butane‚ C4H10(g)‚ produces carbon dioxide and water vapor. In the balanced equation for this reaction‚ what are the coefficients of butane‚ oxygen‚ carbon dioxide‚ and water‚ respectively? Question 1 options: 2‚ 13‚ 4‚ 10 1‚ 6‚ 4‚ 5 1‚ 6‚ 8‚ 10 1‚ 13‚ 4‚ 5 2‚ 13‚ 8‚ 10 Save Question 2 (2.7
Premium Oxygen Hydrogen Nitrogen
Stoichiometry Practice Problems Be sure to balance all equations before you start calculating! Answer key is at the end. 1) Lithium hydroxide reacts with hydrobromic acid to produce lithium bromide and water. If you start with ten grams of lithium hydroxide‚ how many grams of lithium bromide will be produced? 2) Ethylene (C2H4 ) reacts with oxygen gas to produce carbon dioxide and water. If you start with 45 grams of ethylene‚ how many grams of carbon dioxide will be produced?
Premium
ETHERS Classification of Ethers: Symmetrical ethers – two groups attached to O are identical Ex. CH3CH2OCH2CH3 – diethyl ether Unsymmetrical ethers – two groups attached to O are not identical Ex. CH3CH2OCH3 – ethyl methyl ether Physical Properties of Ethers: Ethers have much lower boiling points compared to alcohols of comparable MWs. BPs of ethers increases with increasing MW. BPs of isomeric ethers increase with increasing alkyl chain length. BPs of ethers are about the
Premium Nucleophile Alcohol Diethyl ether
Limiting Homework English 101 Stundents Under Stress In the article “Students under Stress” author Marcia Clemmitt points out that students who are undergoing stress in school is because of the increase of homework. Too much homework is causing an increase of problems for students. The increase of homework is causing students to be depressed‚ stressed‚ and pressured unnecessarily‚ especially for students at young ages causing them to have a negative view of school. The amount of homework
Premium
Determining the Limiting Reactant and Percent Yield in a Precipitation Reaction Objectives: Observe the reaction between solutions of sodium carbonate and calcium chloride. Determine which of the reactants is the limiting reactant and which is the excess reactant. Determine the theoretical mass of precipitate that should form. Compare the actual mass with the theoretical mass of precipitate and calculate the percent yield. Materials: Balance 0.70 M sodium carbonate solution‚ Na2CO3(aq) Graduated
Premium
Fewer than one percent of people who are exposed to alcohol in the U.S have required medical attention due to consumption. Some people argue that strict laws on alcohol are needed to prevent people from endangering themselves or others‚ however if we taught moderation and responsibility at an early age we could still enjoy the benefits of drinking in a more controlled environment. The laws that focus on drinking need to be formed to include all of the teaching moments and benefits that go along with
Premium Alcoholic beverage Drinking culture Wine
The article‚ “Limiting Democracy: The American Media’s World View‚ and Ours‚” written by Glenn Greenwald presents that fallacious facts have been conferred by the media as a whole which leads to political bias that was built upon misquoted or manipulated truth. Greenwald wrote‚ “One of the difficulties in discussing the notion that it is the media that limits our idea of politics is that we all have an inherent resistance to believing that our own understanding of the political world is artificially
Premium Mass media Journalism Journalist
Limiting Immigration Would you reject or support David Miller’s grounds for limiting immigration? In his 2005 “Immigration: The Case of Limits” paper‚ David Miller argues in favor of the right for countries to limit immigration. He replies to defenders of open borders and gives conditions for morally acceptable immigration policies. Most importantly‚ he offers two reasons for nation-states to limit the flux of incoming long-term residents (refugees are thus not part of our discussion) to their
Premium Population Population Population growth