The number of atoms present in 0.012 kilograms of isotopically pure Carbon-12, being 6.0221415 x 1023. By definition, the number of elementary entities (atoms or molecules) comprising one mole of a given substance
0221367 10^23. 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
Number of units in one mole of any substance (defined as its molecular weight in grams), equal to