What is the molecular formula of a compound if its empirical formula is #NO_2# and its molar mass is 138.02 g/mole?
Molecular Formulae = Empirical Formulae
If the molar mass of 138.02 g/mol has been provided for you,
divide it by the molar mass of
Nitrogen has a molar mass of 14.0 g/mol, whereas oxygen is 16.0 g/mol
Since 3.00 is the whole number, multiply it by the empirical formula.