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Mole, in chemistry, a quantity of particles equal to Avogadro's number, or 6.02252 × 1023. One mole of a given compound is that number of molecules of the compound. The gram-atomic weight of an element is the weight, in grams, of a mole of that element. The gram-molecular weight of a compound is the weight in grams of a mole of molecules of that compound.

See also: Chemistry.

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21st Century Webster's Family Encyclopedia21st Century Webster's Family Encyclopedia - Mississippian to Mud hen