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.

Options

• 4

• 10

• 2

• 3.5

Answer 1

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 4 g mol⁻¹.

Explanation:

Using the ideal gas equation PV = nRT

`1.5 xx 416 = 100/"M" xx 0.083 xx 300`

M = 3.99 ≈ 4