Find the molecular formula of a substance containing 5.88% hydrogen and 94.12% sulfur by mass.

Find the molecular formula of a substance containing 5.88% hydrogen and 94.12% sulfur by mass. The density of the substance at is equal to 1.518 g / l.

Let m (compounds) = 100 g
then
m (S) = 94.12 g n (S) = 94.12 \ 32 = 2.94 mol
m (H) = 5.88 g n (H) = 5.88 \ 1 = 5.88 mol
n (S): n (H) = 2.94: 5.88 = 1: 2
M = p * Vm = 1.518 * 22.4 = 34 g \ mol
hence the molecular formula H2S
Answer: H2S