Avogadro's number

Avogadro's number

Number of units in one mole of any substance (defined as its molecular weight in grams), equal to 6.02214179 1023. The units may be electrons, atoms, ions, or molecules, depending on the nature of the substance and the character of the reaction (if any). See also Avogadro's law; law of mass action; stoichiometry.

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