Cu2+(aq) + Zn + Cu + Zn2+(aq) (Balanced) Stage 1 Dissolution of Copper Mass of vial & copper = 3.598g Mass of vial = 2.504g Mass of copper = 1.094g Calculate the moles of copper‚ this is the mass of copper (in g) divided by the atomic mass of copper‚ (63.5 g/mol) Moles of copper = mass (g) ÷ (63.5 g/mol) = 0.017g/mol Copper description Solid ribbons‚ of a reddish-brown metallic appearance. HNO3 description Clear transparent
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experiment is to convert copper metal through a series of intermediate copper compounds back into copper metal. By weighing the copper at the beginning and at the end of the experiment the percentage yield can be determined. Method: The experiment was carried out as outlined in the practical manual. Results: Table: showing masses: Mass copper wire 0.2510 Mass crucible 28.9257 Mass watch glass 19.6213 Mass watch glass + copper 19.7890 Mass copper product 0.1677 Calculations:
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Moles of Iron and Copper Lab Data and Observations Before the reaction: Mass of empty‚ dry beaker: 153.44g Mass of beaker + copper (II) chloride: 161.44g Mass of two iron nails: 7.27g After the reaction: Mass of two iron nails: 6.29g Mass of beaker + copper (dry): 154.50g Questions and Calculations 1. a) Mass of two iron nails before the reaction – Mass off two iron nails after the reaction = Mass of iron used in the reaction = 7.27g – 6.29g = 0.98g
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In the experiment‚ synthesis of copper compounds‚ the purpose was to recover the original amount of copper after series of chemical reactions. Then returning the copper back to its original form. The copper wire originally weighted 1.0099 g‚ but after the copper was transformed into Cu(OH)2 to CuO to CuSO4 and finally into Cu‚ the mass of the recovered copper was 1.1023g; the percent yield was 109%. Since the percent yield is more than 100%‚ an error must have occurred somewhere in the lab. A possible
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In Copper Sun‚ Amari is a happy teenage and she is a slave. She was engaged to the most handsome man in her African village. One morning Amari goes outside and her little brother kwasi was hanging from a tree being silly and Amari goes to get her mom some vegetables for breakfast and out of nowhere white men enters Amari’s village setting things on fire and killing people. After a while then men took chained and shackled her and put her into a slave ship. A few weeks later Amari was sold to a man
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Analysis: Copper Lab 1) Calculate the mass of the copper that was recovered 2) Use the formula shown below to calculate the “percent of recovery” of copper for your experiment. 3) Use the proper symbol and formula to write balanced equation for each of the five copper reactions‚ include state symbols. 4) Classify each of the five copper reactions. (Refer to the above order‚ please!) A) Single Displacement B) Double Displacement C) Decomposition D) Double displacement E) Single Displacement
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Baugh and Cable point out that there is evidence that at the time of the American Revolution and notably in the years shortly following it‚ Americans were starting to become conscious of their language and have the belief that it might be destined to have a future as magnificent as that which they confidently expected for the country itself. The English language on this continent apparently developed certain differences in the 150 years since the founding of Jamestown and Plymouth. According to
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Bangladesh submarine cable network Self Introduction Bangladesh Submarine Cable Company Limited (BSCCL) (http://www.bsccl.com.bd/) having its Principal office at Telejogajog Bhaban 37/E‚ Eskaton Garden‚ Dhaka-1000 is the only company dealing with submarine cable business in Bangladesh. It has been incorporated as a Public Limited Company in 2008 It deals in provisioning of telecom infra structure service primarily via submarine cable and domestic high capacity optical fiber networks. Company
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The adaptation of natural fiber composites in the consumer industry has not had the same explosive growth as with the transportation or even the construction industry. The benefits of cost savings and weight reduction that can be obtained with natural fiber composites played a significant role for the proliferation into those respective industries. But in the consumer market‚ stemming from the rise of synthetic fibers starting in the 1940’s‚ glass fiber and carbon fibers have dominated the market
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CHAPTER 1 INTRODUCTION The term ‘Cable Modem’ is quite new and refers to a modem that operates over the ordinary cable TV network cables. Basically you just connect the Cable Modem to the TV outlet for your cable TV‚ and the cable TV operator connects a Cable Modem Termination System (CMTS) in his end (the Head-End). Actually the term "Cable Modem" is a bit misleading‚ as a Cable Modem works more like a Local Area Network (LAN) interface than as a modem. Cable modems allows consumers access to the
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