Units of amount of substance
= Units of amount of substance
{wiki=Category:Units_of_amount_of_substance}
The unit of amount of substance in the International System of Units (SI) is the mole (symbol: mol). The mole is defined as the quantity of substance that contains as many elementary entities (such as atoms, molecules, ions, etc.) as there are in 12 grams of carbon-12 (^12C). This number, known as Avogadro's number, is approximately \\(6.022 \\times 10^\{23\}\\) entities per mole.