Question

Q.2. Calculate the molar volume of a gas at STP.

Answer 1

Dear Student

STP stands for standard temperature and pressure , temperature is 273 ^oK and 1 atm pressure.
Now putting these values in the gas equation: $PV=nRT$
R = universal gas constant = 0.082 L atm / K / mol

​$$\begin{gathered} 1atm\times V=1mol\times 0.082Latm{K}^{-1}mo{l}^{-1}\times 273K \\ V=0.082\times 273L \\ =22.386L\hspace{0.17em} \\ =22.4L\hspace{0.17em} \end{gathered}$$
So, the molar volume at STP is 22.4 L

Regards.