The molar formula of a compound can be obtained
from the given molar mass and the empirical formula of the compound. In this
case, the molar mass is 30.08 grams and the empirical formula is CH3. The
molecular mass of CH3 is 15.04 grams. We divide the molar mass to 15.04, the answer
is 2. Hence the molecular formula is C2H6.
