Question

100 g of an ideal gas is kept in a cylinder of 416 L volume at 27°C under 1.5 bar pressure. The molar mass of the gas is ________ g mol-1. (Nearest integer). (Given : R = 0.083 L bar K-1 mol-1)

Answer 1

The correct answer is 4
From combined gas law, we get
PV = nRT
$PV = \frac{W}{M}RT$
$1.5×416=\frac{100}{M}×0.083×300$
Therefore, M = 4 g/mol