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_k = \frac{\nu_k}{\sum_i \nu_i} = \frac{N_k}{\sum_i N_i} |
where
\displaystyle \nu_i = N_i/N_A | amount of substance of the i-th mixture component |
\displaystyle \nu = N/N_A | total amount of substance \nu 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 ]