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the current U.S. penny is only 2.5% copper the remaining

the current U.S. penny is only 2.5% copper the remaining portion is zinc. Given the density of copper as 8.94 g/cm and the
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2. asked by Devante
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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 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
3. 1,067 views
In copper plating, a current of 0.5A is allowed for a cathode area of 100cm2. If this current is maintained constant for
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2. asked by Same
3. 639 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
3. 2,239 views
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. 2,875 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. 2,174 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. 1 answer
2. asked by Twynna
3. 526 views