To begin, you are required to know the molecular molar mass of the compound. You must also compute the molar mass of the empirical formula. A molecular formula is always a whole number multiple of the empirical formula.
Work Step by Step
Divide the molecular molar mass by the empirical molar mass in order to get this whole number $n$. Then multiply the subscripts of the empirical formula by this whole number in order to obtain the molecular formula.