In order to determine its molecular formula, it is necessary to know what about the compound?
protons mass
lipid mass
polar mass
molar mass
Empirical formulas can be determined from the percent composition of a compound. In order to determine its molecular formula, it is necessary to know the molar mass of the compound. Chemists use an instrument called a mass spectrometer to determine the molar mass of compounds. In order to go from the empirical formula to the molecular formula, follow these steps:.