The gramme molecular volume is the volume occupied by one gramme mole of a substance in the gaseous or vapour state at STP.
The total gramme molecular volume of the substance is 22.4dm3 or 22400cm3.
At STP, the mass in gram of 22.4dm3 of a gas or vapour equals its gramme molecular weight.
Final Answer:
The volume of one mole of a gas occupied at a standard temperature and pressure, STP, is defined as the gramme molecular volume.