- The SI fundamental unit of amount of substance. Such a substance may be subatomic particles, atoms, molecules, ions, and so on. There are approximately 6.022142 × 1023 elementary entities in a mole.
- The molecular weight of a substance, expressed in grams per mole (1). For instance, a mole of sodium chloride is approximately 58.44 grams, as the combined molecular weight of sodium and chlorine is approximately 58.44 atomic mass units. Also called gram-molecular weight.
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