Question

Buckminsterfullerence is a recently allotrope of carbon in which carbon atoms form molecules of formula C_60, and they look like soccer balls, also called "bucky balls." How many moles of bucky balls are there in a sample of 150mg of Buckminsterfullerene?

Answer 1

Since molar mass of Bucky ball i.e C_{​​​​​​60}​ is = ( 12 x 60 ) = 720 g/mol

And mass = 150 mg = 150 x 10^-3 g

So, no. Of moles = mass / molar mass = 150 x 10^-3 / 720 = 2.08 x 10^-4 moles of Bucky ball are there.