molar volume

The molar volume, symbol V, is the volume occupied by one mole of a substance (chemical element or chemical compound) at a given temperature and pressure. It is equal to the molar mass (M) divided by the mass density (ρ). It has the  SI unit cubic metres per mole (m³/mol), although it is more practical to use the units cubic decimetres per mole (dm³/mol) for gases and cubic centimetres per mole (cm³/mol) for liquids and solids.
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The volume occupied by one mole of a material. For example, the molar volume of an ideal gas at STP is 22.4 L/mol.