# relative mass concentration of vapour

> physical quantity

**Wikidata**: [Q76379357](https://www.wikidata.org/wiki/Q76379357)  
**Source**: https://4ort.xyz/entity/relative-mass-concentration-of-vapour


## References

1. ISO 80000-5:2007 Quantities and units — Part 5: Thermodynamics
2. ISO 80000-5:2019 Quantities and units — Part 5: Thermodynamics