Question

The ratio of the weight of one litre of a gas to the weight of 1.0 L oxygen gas both measured at S.T.P. is 2.22. The molecular weight of the gas would be :

• A. 14.002
• B. 35.52
• C. 71.04
• D. 55.56

Answer 1

Answer: (C)

71.04

Answer 2

(3)

$\frac{wt.oflitregasatSTP}{wtoflitreO_{2}atSTP} = \frac{molarmassofgas}{molarmassofO_{2}}$

2.22 = $\frac{M}{32}$ M = 71.