jaakanavela jaakanavela

11-10-2022
Chemistry

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Need of help!!

The U.S. penny has a diameter of 1.905 cm. The densities of copper and zinc are 8.96 g/cm^3 and 7.14 g/cm^3, respectively.

1. Between 1944 and 1982, the penny was made of a brass alloy that is 95% copper and 5% zinc by mass. If the mass of the penny was 3.09 g, find the volume (in cm^3) and thickness (in cm) of the penny in mm. (Assume the penny is a cylinder, V = π r^2 h)

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