amount fraction

symbols: $y$, $x\ (\rm{s/l})$
synonym: mole fraction
also defines: number fraction
https://doi.org/10.1351/goldbook.A00296
Amount of a constituent divided by the total amount of all constituents in the mixture. It is also called mole fraction. Amount fraction is equal to the 'number fraction': the number of entities of one constituent divided by the total number of entities in the mixture.
See also: fraction
Source:
Green Book, 2nd ed., p. 41 [Terms] [Book]
Citation: 'amount fraction' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.A00296 RIS BibTex EndNote
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