The new penny is not made of pure copper. Details below:
The density of a substance is simply defined as the mass of the subtance per unit volume of the substance. Mathematically, it can be expressed as
Density = mass / volume
With the above formula, we can determine the density of the penny. Details below:
From the question given above, the following data were obtained:
Density = mass / volume
Density = 2.49 / 0.349
Density = 7.13 g/cm³
Thus, the density of the penny is 7.13 g/cm³
Since the density of copper (i.e 8.96 g/cm³) and the density of the penny (i.e 7.13 g/cm³) are not the same, therefore, we can conclude that the penny is not made of pure copper
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