# Problem: Assume a perfect sphere of Al has a radius of 0.700 mm. How many Al atoms are in the sphere?The density of Al is 2.70 g/cm3. Volume of a sphere = 4/3 π r3a. 8.66 x 1019b. 8.66 x 1020c. 6.30 x 1022d. 6.30 x 1025e. 8.66 x 1025

###### Problem Details

Assume a perfect sphere of Al has a radius of 0.700 mm. How many Al atoms are in the sphere?
The density of Al is 2.70 g/cm3. Volume of a sphere = 4/3 $\mathrm{\pi }$ r3

a. 8.66 x 1019
b. 8.66 x 1020
c. 6.30 x 1022
d. 6.30 x 1025
e. 8.66 x 1025