@wikipedia
Synonym: Mole fraction = Molar fraction
A ratio of amount of a given mixture component to the total amount of substance
\nu in the mixture:
(1) | x_i = \frac{\nu_i}{\nu} = \frac{N_i}{N} |
where
\nu_i = N_i/N_A | amount of substance of the i-th mixture component |
\nu = \sum_i \nu_i | total amount of substance in the mixture |
N_A | Avogadro constant |
N_i | amount of molecules/atoms in the i-th mixture component |
N = \sum_i N_i |
As per definition the sum of all mole fractions is strictly unit: \sum_i x_i = 1.
See Also
Natural Science / Chemistry / Chemical Substance / Mixture
[ Pure substance ]