To find the molecular formula, we need to know the ratio of empirical formula mass to the molar mass.

The empirical formula mass is:

(2 x 12.01 g/mol for C) + (3 x 1.01 g/mol for H) = 26.04 g/mol

Then divide the molar mass by the empirical formula mass:

162.27 g/mol / 26.04 g/mol = 6.23

Since the ratio is approximately 6, multiply the empirical formula by 6 to get the molecular formula:

C2H3 x 6 = C12H18