# amount-of-substance fraction

> proportion of a constituent to the total amount of all constituents in a mixture, expressed in mol/mol

**Wikidata**: [Q125264](https://www.wikidata.org/wiki/Q125264)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Mole_fraction)  
**Source**: https://4ort.xyz/entity/amount-of-substance-fraction


## References

1. Freebase Data Dumps. 2013
2. ISO 80000-9:2019 Quantities and units — Part 9: Physical chemistry and molecular physics
3. Quora
4. SI Brochure (9th edition)
5. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)