Chemistry, asked by bailer3, 4 months ago

What happens to pre- and post-1982 pennies in a Bunsen Burner flame?

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Answered by Anonymous

2

Post-1982 pennies are mostly zinc. ... We heat the pennies in the flame of a Bunsen burner. As we heat the silver penny the atoms move. The zinc atoms move in between the copper atoms

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Answered by Anonymous

8

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A post-1982 penny has a mass of 2.5 grams, while the pre- 1982 pennies have a mass of 3.1 grams. The older copper pennies can be heated over a Bunsen burner flame without melting. Zinc melts at a much lower tempera- ture than copper. The melting point of zinc is 420˚C, while that of copper is 1083˚C.

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