The atomic mass of helium is 4.0 u and that of carbon is 12.0 u.
a. The mass of 1 mole of carbon is 1/3 the mass of 1 mole of helium.
b. The mass of 1 mole of carbon is 3 times the mass of 1 mole of helium.
c. One mole of carbon contains 1/3 as many atoms as 1 mole of helium.
d. One mole of carbon contains 3 times as many atoms as 1 mole of helium.