Source: wikibot/amount-of-substance
= Amount of substance
{wiki=Amount_of_substance}
The amount of substance is a fundamental physical quantity that quantifies the quantity of entities, such as atoms, molecules, or particles, in a given sample. It is represented by the symbol \\( n \\) and is measured in moles (mol). One mole of a substance contains exactly \\( 6.022 \\times 10^\{23\} \\) entities, a number known as Avogadro's number.