1. Find the empirical formula mass:

* The empirical formula CH2 has a mass of 12.01 (C) + 2(1.01) (H) = 14.03 g/mol.

2. Calculate the ratio of molar mass to empirical formula mass:

* 42.0 g/mol / 14.03 g/mol = 3

3. Multiply the subscripts in the empirical formula by the ratio:

* CH2 * 3 = C3H6

Therefore, the molecular formula of the compound is C3H6.