A physical property defined as the mass of a given substance (chemical element or chemical compound) by the amount of substance
Ratio of substance mass m to amount of substance \nu:
M = \frac{m}{\nu} |
It relates to molecular mass m_u as:
M = \frac{m}{\nu} = m \frac{N_A}{N} = m_u \cdot N_A |
where
N_A | Avogadro constant |
N |