Chemical Formulae and Equations: Key Terms and Definitions Every Chemistry Student Must Know.

Question 2: A compound has the empirical formula CH₂ and a relative molecular mass of 56. Find its molecular formula. (Ar: C = 12, H = 1)

Model answer: Mr of CH₂ = 12 + 2 = 14 n = 56 ÷ 14 = 4 Molecular formula = C₄H₈