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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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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Pennies were the first coin minted in the U.S ‚the first U.S penny is 223 years old. In recent years‚ there has been a heated debate about money in the United States. Surprisingly‚ it is about the pros and cons of producing and using pennies. In my opinion the penny should no longer be used and produced in America today. Here are some reasons why‚ pennies cost more than it’s worth‚ they are not big money‚ and are so close to worthless. ‘‘ Michael Cooper‚ an eighth grader
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experimental % of copper (Cu) in a post 1982 cent? In this lab‚ we will determine the % composition of a modern (post-1982) penny by using a strong acid called nitric acid (HNO3)‚ to react and dissolve the zinc core‚ leaving only the copper coating. Once only copper remains‚ we will then compare its’ absorbency to the other five post-1982 penny Cu concentrations made in this lab. INTRODUCTION: Before 1982 the US penny was made of pure copper. Because of the high cost of copper‚ the US government
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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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Fifteen-year-old Amari loves life in her home village in Africa. She spends her days strolling along the stream‚ daydreaming about her handsome future husband‚ teasing her little brother‚ and avoiding chores. But everything changes the day the pale-faced visitors arrive. Everyone contributes for the celebration to welcome the strangers. Amari helps her mother arrange the food‚ her storyteller father shares his tales‚ her fiancé plays his drum‚ and everyone dances. But then their world shatters
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In Reaction 1‚ the mass of the pre-cut copper wire was measured with watch glass on the analytical balance‚ the mass was recorded using as many significant figures as possible on Table 2. The copper wire was bended into a circle and laid flat on the bottom of the 250 mL beaker. Inside the fume hood‚ 4mL 16M of HNO3 was added into the 250mL beaker that contained the copper wire. The copper wire was completely dissolved by swirling the beaker. The observation was recorded in Table 3. For Reaction 2
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Copper Kettle Catering Case 1. The operations of Copper Kettle Catering’s delivery-only category is conductive to the application of lean concepts and practices because the Williams’ can efficiently manage the deliver-only process by minimizing excess inventory‚ unnecessary activities‚ movement and material handling. These factors will help to enhance service quality‚ flexibility‚ reliability and improve customer satisfaction. If Copper Kettle Catering has the resources to purchase automated
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1. (45 points) Calculate the value of Carborundum (on an aggregate and per share basis) using both the Free Cash Flow to Capital (FCFcap) and Free Cash Flow to Equity (FCFeq) methods. Use the following assumptions: Note: Rf=5.6%; MRP=8.8%‚ Carborundum’s levered beta (prior to deal)=1.16 FCFeq=Net Income + Non Cash Deductions-Capital Expenditures-Change in Net Working Capital-Debt Repayment+ Debt Issuances + Miscellaneous Extras Answer: Value of Kennecott using FCFcap is: $53.8 Value of Kennecott
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Chilean Copper Mine Name XBCOM/275 May 18‚2014 Dr Jose A. Cotay Chilean Copper Mine On August 5‚ 2010 there was one of the worst mining disasters in the history of mining. In the Atacama Deseret one of the largest mines there was a clasp. On this day 33 miners were unaccounted for after they did a head count of all the miners that come out the dust and dirt. The company was not sure if they were alive or dead. The community that these men lived in was grief stricken and their families were
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