1. Calculate the empirical formula mass:

* C: 12.01 g/mol

* H: 1.01 g/mol

* O: 16.00 g/mol

* Empirical formula mass = 12.01 + 1.01 + 16.00 = 29.02 g/mol

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

* 120.1 g/mol / 29.02 g/mol ≈ 4.14

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

* Since the ratio is approximately 4, the molecular formula is (CH2O) * 4 = C4H8O4