Avogadro's Number

The number of items in a sample of a substance which is equal to the number of atoms or molecules in a sample of an ideal gas which is at standard temperature and pressure. It is equal to about N = 6.022045x1023 mol-1

How big is Avogadro's Number?

Reference

Bill Bryson "A Short History of Nearly Everything"

See also: Avogadro, Armedeo, Boltzmann′s Constant, Physical Constants.

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Subjects: Chemistry Physics