chemistry
posted by andrew .
Assume that the entire mass of an atom is concentrated in its nucleus, a sphere of a radius 1.5 x 10 to the 5 pm. If the mass of the atom is 2.39 x 10 to the 22 g, what is the density?

Volume of a sphere:
V = (4/3)πr^{3}
π=3.14, and r = 1.5x10^{17}m
Find the volume of the nucleus in m^3
1 m^3 = 1x10^6 cm^3
Convert the volume to cm^3
Substitute M in grams and V in cm^3 into:
D = M/V
The units of density are grams/cm^3