regulations because of the pollution it was causing. Hart and Nelson debated to reinforce citizen’s rights in order to sue the EPA over bad enforcement of the proposed law. However‚ Poage was more concerned over the industries that will be affected by limiting pesticides. Poage called for indemnification for manufacturers whose pesticides are legally removed from the market. Hart and Allen were largely against giving
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There are times of the year when students begin to be exhausted‚ and it is because of all the homework they have to do. As they sit down and pull out their piles of homework‚ it rises to the ceiling. Moreover‚ incalculable of kids go to bed extremely late at night because of it. Teachers should limit the amount of homework they give out. Too much homework has negatively affected kids‚ especially when it causes a tremendous deal of stress‚ too much time is required to complete it‚ and it impacts
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CHEM 14 Problem Set 2 Deadline of submission: MHE2 – Feb 7; TFC – Feb 8 SOLVE ALL PROBLEMS. SHOW YOUR SOLUTIONS CLEARLY. 1. Arginine is a semi-essential amino acid that is used to form nitric oxide which in turn plays an important role in the nervous as well as cardiovascular system. It contains C‚ H‚ N and O. Combustion of a 0.75 g pure sample which contains 2.591 x 1021 molecules of the amino acid produced 0.03015 mols of water and 578.59 mL of CO2 at STP. The same sample contains 5.181
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Basic Stoichiometry PhET Lab rvsd 2/2011 Let’s make some sandviches! _ Introduction: When we bake/cook something‚ we use a specific amount of each ingredient. Imagine if you made a batch of cookies and used way too many eggs‚ or not enough sugar. YUCK! In chemistry‚ reactions proceed with very specific recipes. The study of these recipes is stoichiometry. When the reactants are present in the correct amounts‚ the reaction will produce products. What happens if there are more or less of
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Homework has become part of the school life of the students. Homework is a schoolwork that the student is required to do at home‚ this is what help to the students to practice what they had learned in class‚ but now we wonder if homework is a real contribution in the learning of the students. All students have homework for school and mostly of them are having a great amount of homework which leads to the student to not having time for extracurricular activities such an academic activities or sports
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Stoichiometry Lab Stoichiometry is the end result of adding up chemical elements that were involved in chemical reactions (http://dictionary.reference.com/browse/stoichiometry). The word stoichiometry was obtained from two greek words meaning element and measure. This explains the definition for the term. A chemist named Jeremias Benjamin Richter was the chemist responsible for first realizing what stoichiometry was (http://www.chemteam.info/Stoichiometry/What-is-Stoichiometry.html). In 1972
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Ocean County College Department of Chemistry Stoichiometry of a Precipitation Reaction Submitted by Hendy Zelishovsky Date Submitted: 4/26/2012 Date Performed: 4/25/2012 Lab Section: Chem-180-DL1 Course Instructor: Dr. Cynthia Spencer Purpose
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IB CHEMISTRY Stoichiometry Lab Data Collection and Processing Item | Mass | Small beaker (100 mL) | 47.0 grams | Large beaker (150 mL) | 82.4 grams | Mass of filter paper | 0.50 grams | Mass of coffee filter | 1.00 gram | 150mL beaker + 20mL water + lead nitrate solution | 96.1 grams | 100mL beaker + 20mL water + sodium carbonate solution | 64.2 grams | Watch glass | 32.2 grams | Precipitate + filter paper + coffee filter | 2.20 grams | Precipitate + 150mL + coffee filter
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Ferric Chloride TS —Dissolve 9 g of ferric chloride in water to make 100 mL. Thioacetamide TS —Dissolve 4 g of thioacetamide in 100 mL of water. Thioacetamide–Glycerin Base TS —Mix 0.2 mL of thioacetamide TS and 1 mL of glycerin base TS‚ and heat in a boiling water bath for 20 seconds. Use the mixture immediately. Lead Nitrate Stock Solution— Dissolve 159.8 mg of lead nitrate in 100 mL of water to which has been added 1 mL of nitric acid‚ then dilute with water to 1000 mL. Prepare and store
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precipitates caused by different limiting reactants. A precipitate results in a solid formed by an ionic compound. Calcium nitrate and copper sulfate will be added to separate beakers with approximately half of the solutions from the Büchner funnel system of each trial to test for the formation of precipitates. The limiting reactant is the reactant that will run out first in the chemical reaction. It is important to recognize which chemical or compound is the limiting reactant because the reactant in
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