Empirical formulas and Molecular formulas

Empirical formula: it gives the lowest term ratio of atoms (or moles) in the formula. *All ionic compounds are empirical formulas*

Ex: C3H6 (propene) ---> molecular formula
     CH2 ----> empirical formula


Molecular formula: it is a multiple of the empirical formula and shows the actual number of atoms that combine to form a molecule

Ex. A molecule has an empirical formula of C4H10 and a molar mass of 29 g/mol, what is the molecular formula
Ans: C2H5