The empirical formula is the simplest ratio of whole numbers of components in a compound. Molecular formula gives the actual composition of components in the compound. Empirical formula - NO₂ Mass of one empirical unit - 14 + (16x2) = 46 g Mass of one mole of the compound - 46 g/mol Number of empirical units = 46 g/mol / 46 g Number of empirical units = 1 Therefore molecular formula 1(NO₂) Molecular formula - NO₂
