Question

The volume of 1.5 $gm$ moles of helium gas under standard conditions of temperature and pressure is:

• A. 22.4 $L$
• B. 33.6 $L$
• C. 44.8 $L$
• D. 11.2 $L$

Answer 1

The correct option is B 33.6 $L$

At STP, the volume of 1 gm mole of a gas $=22.4$ litres.

Therefore, the volume of $1.5$ gm moles $=1.5\times 22.4=33.6$ litres

So, option $B$ is correct.