At STP, volumes occupied by 1.0g of hydrogen and 0.6786 g of air are 11.2 L and 0.525 L respectively. Calculate the vapour density of air with respect to hydrogen.

Explanation

Vapour density of air with respect to hydrogen
`=("average molecular mass of air")/("molecular mass of "H_(2))`
`=("mass of 22.4L of air at STP")/("mass of 22.4L of "H_(2)" at STP")=((0.6786)/(0.525)xx22.4)/((1)/(11.2)xx22.4)=14.47`