Dominick Prince Partner: Ryan Potts Reactions of Copper Due: Monday January 14‚ 2013 Beginning of Class Block: 5 Purpose / Safety: Purpose: 1. Observe some chemical reaction of copper and its compounds. 2. Write word and formula equations to represent these reactions. Safety: 1. Wear goggles and a lab apron or coat. 2. Tie back long hair and secure loose clothing before working with an open flame. 3. Corrosive substance; avoid contact with skin‚ eyes‚ and clothing
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17 g Determine the percent yield of NaCl in your experiment‚ showing all work neatly in the space below. (5 points) 7.17 g / 8.8197 g = 0.81295 = 81% If you had not heated the product long enough to remove all of the water‚ explain in detail how that would have specifically affected your calculated actual yield and percent yield. (5 points) The product’s mass would be greater making the calculations adjust. If my actual yield is greater‚ then so would my percent yield.
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A brief introduction of People’s Republic of China’s Tort Law Student Name: QIAN‚Xin Group: MLM09-01 Student Number:0892439 Table of Contents Background The Tort Liability Law of the People’s Republic of China (‘Tort Law’) which was passed on December 29‚ 2009‚ came into effect since July 1‚ 2010. It is believed that more and more public affairs could damage civil benefits as a result of the rapid development in china’s economy and society. As the response
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Beer school Q1: What information from a need analysis (organization‚ task and personal) might have suggested the need for employees to attend the beer school? Considering the need analysis at all three levels (organization‚ task and personal) for sending employees to attend the beer school‚ suggestions are mentioned below: Organization Level: For the effectiveness of this training program‚ organization has already streamlined the training with its business strategy. Company’s mission‚ vision
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in the minting of pennies before and after 1982 by calculating their densities. Hypothesis If the penny was made after 1982 then its density will be higher than those made before 1982. Materials • 1 Graduated cylinder • 30 mL of water • 10 pennies minted before 1982 • 10 pennies minted after 1982 • 1 electric scale Procedure The mass of ten pennies minted before 1982 was calculated five times using the scale and then averaged. These steps were repeated with the pennies minted after 1982
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| Percent Yield Lab | | | | 4/20/2012 | Mrs.Sardella Per4 Matt ‚ Kait Mrs.Sardella Per4 Matt ‚ Kait | Introduction *Limiting Reactant: A reactant that is completely consumed during a chemical reaction‚ limiting the amount of product that is produced. *Excess Reactant: A reactant that remains after a reaction is over. *Theoretical Yield: The amount of product that is predicted by stoichiometric calculations *Actual Yield: The amount of product that is recovered
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LET’S START WITH COPPER CHEMISTRY REPORT 2012 INTRODUCTION: The law of conservation of mass means that the atoms of an object cannot be created or destroyed‚ but can be moved around and be changed into different particles. This law says that when a chemical reaction makes two different atoms into a new product‚ the mass will be the same. Knowing this the mass of the copper should be the same at the beginning and at the end of the experiment. In this investigation we will see
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Laboratory report Aluminum Copper Alloy MSCI 300 – Thermodynamics of Materials Alexandre de Freitas Silveira Eau Claire December 18th‚ 2012. Abstract: At this experiment‚ the composition of an alloy of Aluminum Copper was analyzed via X-Ray Fluorescence. From this‚ it was possible to construct a phase diagram a make some predictions about the possible phases presents at considering the 3 samples used in this experiment‚ the samples prepared at this experiment the sample as delivered
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to stop minting the penny and to never use it again‚ but others want to keep using the penny and not get rid of it. Some people are fighting to get rid of the penny and these articles may pull people to their side: “Penny Wise‚ or 2.4 Cents Foolish?”(Source 1)‚ “Is the Penny Worth It?”(Source 2)‚ “Give a Penny-Save the Day!”(Source 3)‚ and “The Ever-Changing Penny”(Source 4). Some think the U.S. penny should be discontinued because it takes more than one penny to make a penny‚ it’s not worth much
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Identification of a Copper Compound by Percent Mass Unknown Compound: #9 Abstract: The objective of this experiment was to identify the unknown pure copper salt compound of #9. To do this‚ the mass of copper in the unknown was calculated and then divided by the mass of the whole compound to get the percent copper. The molecular weight was also calculated by dividing mass of copper compound used by moles of compound in unknown sample. The percent copper averaged out to 31.6% while the molecular
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