The molar volume of a substance is the volume that one mole of that substance occupies at a specific temperature and pressure.
This law states that equal volumes of all gases, at the same temperature and pressure, contain an equal number of molecules.
Standard conditions for measuring the amount of gas - 0 degrees Celsius and 1 atmosphere pressure.
The unit used in chemistry to count particles such as atoms, ions or molecules. It is defined as exactly 6.02214076×10²³ particles which may be atoms, molecules, ions or electrons.