A new penny has a mass of 2.49 g and a volume of 0.349 #cm^3#. Is the penny made of pure copper? Wy or why not?

1 Answer
anor277
Sep 6, 2016

#"Density, "rho# #=# #"Mass"/"Volume"#

#rho_"coin"# #~~# #7.13*g*cm^-3#

Explanation:

I have an idea that copper metal is denser than this. But as a scientist, you should look up the actual densities of coinage metals, i.e. gold, silver, copper, zinc, iron, nickel. Mind you, the coin is lkely to be an alloy, and have a particular density.

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