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 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
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