Final answer:
The molar volume of a gas at STP is 22.4 L.
Step-by-step explanation:
The molar volume of a gas at STP is 22.4 L.
The molar volume is the volume of 1 mol of a gas. At STP, the molar volume of a gas is 22.4 L/mol.
This value can be determined using the ideal gas law: (1 atm)V = (1 mol)(0.0820 L atm / mol K). All the units cancel except for L, the unit of volume, giving us V = 22.4 L.