Approximately how many atoms of carbon are present in a 120 gram sample of carbon?

To solve this convert the mass of a sample of Carbon from 120 grams into moles of carbon and then using the mole to mole ratio find out the number atoms present.

120/12 = 10 moles of carbon

10 • (6.02 x 10^23) = 6.02 x 10^24 atoms of carbon.