Anew penny has a mass of 2.49 grams and occupies 0.349 cm cubed. if pure copper has a density of 8.96 g/cm cubed, is the new penny put copper?

The new penny is not pure copper

Explanation:

Density is defined as a relation between the mass and the volume :

Now, we are told the density of pure copper is:

And we are given the mass and volume of the new penny, with which we can calculate its density:

As we can see the density of this penny is not equal to the density of pure copper, hence the new penny is not pure copper.

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