kg/kmol

kilogram per kilomole

Molar massexact by definition

The kilogram per kilomole is exactly 10⁻³ kg/mol, numerically identical to the gram per mole. Engineering thermodynamics uses it so the molar mass of air reads 28.97 kg/kmol, the same digits a chemist writes as 28.97 g/mol.

1 kg/kmol 1 g/mol