Mole

The mol is the SI base unit that measures an amount of substance

The SI unit for amount of substance is the mole or mol, which is defined as

• the amount of substance that has an equal number of elementary entities as there are atoms in 0.012 kg of carbon-12.

That number of elementary entities in carbon-12 is the Avogadro constant - N_A - which has a value of 6.02214179 x 10²³ mol⁻¹.

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