A gas mixture contains 0.20 mol H2, 0.30 mol CH4 and 0.50 mol CO. Find the vapour density of the mixture (H = 1, C = 12, O = 16), to one decimal.

JEE Main levelNumerical answerDifficulty 2 of 3mc210

A gas mixture contains $0.20 mol$ $H X_{2}$ , $0.30 mol$ $CH X_{4}$ and $0.50 mol$ CO. Find the vapour density of the mixture (H = 1, C = 12, O = 16), to one decimal.

Numerical answer type, tolerance 0.05.

Total moles = 1.00. Mass = 0.20 x 2 + 0.30 x 16 + 0.50 x 28 = 19.2 g, so M(mix) = 19.2 g/mol. Vapour density = M/2 = 9.6.