Question

At standard pressure and temperature conditions the density of a gas in $g$ and whose molecular weight is $45$, then volume occupied by gas in $1$ is:

• A. $2$
• B. $22.4$
• C. $11.2$
• D. $1000$

Answer 1

The correct option is A $2$

Density $=\frac{mass}{Volume}$

One mole of any gas would occupy 22.4L at STP.

The gas in question would have molar mass of $45g/mol$

$\therefore$Density $=\frac{m}{V}=\frac{45g}{22.4L}=2.0g/L$