Question

At STP conditions, 11.2 L of a gas weighs 24 g. So the molecular weight of gas is:

• A. 48 gm
• B. 24 gm
• C. 12 gm
• D. 18 gm

Answer 1

The correct option is A 48 gm

At STP, 1 mole of a gas corresponds to 22.4 L ,

So 11.2 L of gas corresponds to 0.5 mole.

It is given that 11.2 L corresponds to 24 gm, thus 22.4 L corresponds to 48 gm.

Weight of 1 mole $=$ Molecular weight.

$\therefore$ Molecular weight $=$ 48 gm