Chem word problem?

The average dimension for the radius of an atom is 1.0E-8 cm, and the average radius of a nucleus is 1.0E-13 cm. Determine the ratio of atomic volume to nuclear volume. Assume that both the atom and the nucleus are spherical (V = (4/3)πr3 for a sphere).

Answer:
(10^-8)^3 / (10^-13)^3

10^-24 / 10^-39

= 10^15

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