Normalised measure of the molecules/atoms count N in a given volume of substance:
(1) | \nu = \frac{N}{N_A} |
where N_A = 6.022140758(62) · 1023 mol−1 is Avogadro constant
It relates to the substance volume V and substance molar volume V_m as:
\nu = \frac{V}{V_m} |
See also