Question

Calculate the molar volume of a gas at STP.

Answer 1

STP = 1 atm of pressure and 273 K for temperature

$P=$ 1 atm
$V=$ ???
$n=$ 1 mole
$R=$ 0.0821 atm L/mol K
$T=273$ K

$PV=nRT$

$V=\frac{nRT}{P}$

$V=\frac{0.0821\times 273}{1}$

$V=22.4L$