Question

At STP weight of $1litre$ of a gas is $3.16grams$ and weight of $1litre$ of Hydrogen is $0.09gm$. If molecular weight of Hydrogen is 2, molecular weight of the gas is

• A. 70.8
• B. 64.4
• C. 32.2
• D. 44.6

Answer 1

The correct option is A

70.8

V.D. = $\frac{Weightof{}^{\prime }{x}^{\prime }mlofagas}{Weightof{}^{\prime }{x}^{\prime }mlof{H}_{2}gas}$

= $\frac{3.16}{0.09}=35.4$

M.W. = $2\times VD=70.8$