Empirical formula of ch2 and molar formula of 56 grams what is molecular formula

To find the molecular formula from the empirical formula, you need to find a multiple (x) that will give you the molar mass of the compound which in the question is 56 g/mol.

If CH₂ is the empirical formula
 molar mass of empirical formula = (12 × 1) + (1 × 2) g/mol
                                                     =  14 g/mol
let x = multiple
let molecular formula = Cₓ H₂ₓ

            multiple = molecular mass ÷ empirical mass
                         =  56 g/mol ÷  14 g/mol
                         =  4

If molecular formula = Cₓ H₂ₓ
then molecular formula = C₄H₂₍₄₎
                                      = C₄H₈