quantitykind:MolarVolume
The molar volume, symbol \(V_m\), 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 (\(\rho\)). It has the SI unit cubic metres per mole (\(m^{1}/mol\)). For ideal gases, the molar volume is given by the ideal gas equation: this is a good approximation for many common gases at standard temperature and pressure. For crystalline solids, the molar volume can be measured by X-ray crystallography.