1.47 litre of a gas is collected over water at $30^{\large\circ}C$ and 744mm of Hg . If the gas weight 1.98g and vapour pressure of water at $30^{\large\circ}C$ is 32mm , What is the molecular weight of gas?

Question

$(a)\;28.6g\qquad(b)\;30.76g\qquad(c)\;35.76\qquad(d)\;32.10g$