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a pure copper penny contains

a pure copper penny contains appoximatel 3.0 x 10 to the 22 copper atoms. use the definitions in the previous problem to
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2. asked by Anonymous
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A pure copper penny is slid along a steel counter top. If the coefficient of kinetic friction between the copper and the steel
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2. asked by Sammy
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how do you know if a penny is pure copper?
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2. asked by Sara
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If you put copper coated penny 1983or newer, in vinegar, it turns blackish green. If you rub the copper off half the penny first
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2. asked by lulu
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Before 1982 U.S pennies were made of solid copper. As the price of copper rose,the U.S mint switched to a composition that is
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2. asked by Boriqualissa
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A new penny has a mass of 2.54 g and a volume of 0.354 cm3. Is the penny made of pure copper? what is its density?thanks:)
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2. asked by Maria
3. 806 views
If you scratch a penny with an steel file, will the copper of the penny rub off on the file, or the steel (iron) of the file rub
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2. asked by Please help
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A modern penny weighs 2.5 g but contains only .063 g of copper. How many copper atoms are present in a modern penny? Thanks in
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2. asked by Danya
3. 2,894 views
Before 1982 the US Mint cast penny coins from a copper and zinc mixture. If a 1980 penny weighs 3.051g and contains 0.153g zinc,
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2. asked by Twynna
3. 540 views
Before 1982 the US Mint cast penny coins from a copper and zinc mixture. If a 1980 penny weighs 3.051g and contains 0.153g zinc,
1. 4 answers
2. asked by Twynna
3. 2,187 views