mole - the amount of a substance that contains the same number of particles as there are atoms in exactly 12 g of carbon-12.
This amount contains 6.022 x 1023 particles. The number, 6.022 x 1023, is called Avogadro’s number and is abbreviated N.
One mole (1 mol) contains 6.022 x 1023 particles (to four significant figures)
Definition of the Mole
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