Derive the molecular formula of an organic compound containing 81, 8% carbon and 18.2% hydrogen.

Derive the molecular formula of an organic compound containing 81, 8% carbon and 18.2% hydrogen. It is known that the mass of 1 liter of this substance is 1.97 g.

n (in islands) = V / Vm = 1 / 22.4 = 0.044 mol
M = m / n = 1.97 / 0.044 = 44.17 g / mol
m in-islands C in the compound = W * m of the whole thing = 0.818 * 44.17 = 36.1 g
n (C) = 36.1 / 12 = 3
m in H in the compound = W * m of the whole thing = 0.182 * 44.17 = 8 g
n (H) = 8
Answer: C3H8