Percent Copper in Brass Background The scientific concepts involved in this lab include Spectroscopy‚ Beer’s law‚ Calibration curve‚ concentration‚ and electronic transitions. The main objective of this experiment is to see how the percent composition of brass can be determined to verify the properties influenced by copper and zinc. Brass is a generic term for alloys of copper and zinc. The main technique used in this experiment is Spectroscopy. The three equations used in this lab are: Y = mx
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Writing assignment (Case Study of Sammy) There are several problems that the main character Sammy has which are lack of self-concept‚ lack of self-esteem and lack of communication with parents and the failure of controlling her emotion. Firstly‚ Sammy is lack of self-concept which is the totality of thoughts and feelings with reference to oneself as an object.(Rosenberg‚1979) According to the scenario‚ it showed that Sammy do not have definite view towards her future because she do not know the
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AEREN FOUNDATION’S Maharashtra Govt. Reg. No.: F-11724 SUBJECT:-E-COMMERCE MANAGEMENT COURSE : Total Marks : 80 Attempt all the cases Case 01 GM’s E-Business Strategy INTRODUCTION US-based General Motors (GM)‚ the largest automobile company in the world‚ was in trouble in the late 1990s. The company’s market share in the US automobile market had been steadily declining from a high of 50% in the late 1960s to a low of 28% by 1999.Analysts pointed out that GM had been in the grip of a vicious
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NFS 5360 - MANAGEMENT FUNCTIONS‚ ORGANIZATIONAL STRUCTURE‚ and DELEGATION Managing Within An Organization: Organizational Structure & Management Functions‚ Roles and Skills Mary E. Width‚ M.S‚ R.D. Wayne State University The Controversy • ENVIRONMENT It doesn’t matter how well it worked in a factory‚ it won’t work here - this is a hospital (or nursing home‚ urgent care center‚ etc.). • MANAGEMENT Good management is good management no matter where it’s practiced. What worked elsewhere will
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What are the key successes factors of Toys “R” Us in toy industry? Answer. There are many key success factors that tops Toys “R” Us in the toy industry from quality to value‚ from diversification to market penetration in the market‚ from customer orientation to low cost leadership. These all factors contribute to the success of this company in the toy industry. These factors are to be discussed and they are as follows: In concept the main and the
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Determining the Percent Copper and Zinc in Pennies from Density Lab Report Procedure: For pre-1982 pennies- Mass 10 pennies‚ record data. Fill a 100mL graduated cylinder to 40mL or enough to fully submerge the pennies with water‚ record the volume in data table. Carefully place the pennies into the graduated cylinder‚ record the final volume of the water in data table. To find the volume of the pennies‚ subtract the final volume from the initial‚ record the data. Repeat this procedure twice more
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CASE 2 Harrison T. Wenk III is 43‚ married‚ and has two children‚ ages 10 and 14. He has a master’s degree in education and teachers junior high school music in a small town in Ohio. Harrison’s father passed away two months ago‚ leaving his only child an unusual business opportunity. According to his father’s will‚ Harrison has 12 months to become active in the family food-catering business‚ Kare-Full Katering‚ Inc.‚ or it will be sold to two key employees for a reasonable and fair price. If Harrison
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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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