Amount of substance

{
  "id": "MLC-T-CHM-000509",
  "term": "Amount of substance",
  "field": "Chemistry",
  "definition": "A measure of the quantity of elementary entities (such as atoms, molecules, ions, or electrons) present in a sample. It is proportional to the number of these entities, with the proportionality constant being the Avogadro constant. The SI base unit for amount of substance is the mole (mol).",
  "synonyms": [
    "chemical amount"
  ],
  "subject": "Physical and Biophysical Chemistry",
  "references": [
    "BIPM, Le Système international d’unités (SI), SI Brochure, 9e ed. (2019), p. 21 (https://www.bipm.org/fr/publications/si-brochure/)",
    "BIPM, The International System of Units, SI Brochure, 9th ed. (2019), p. 134 (https://www.bipm.org/en/publications/si-brochure/)",
    "PAC, 2018, 90, 175. 'Definition of the mole' on page 177 (https://doi.org/10.1515/pac-2017-0106)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/amount-of-substance/"
}