PhysicalConstants`

AvogadroConstant

As of Version 9.0, physical constant functionality is built into the Wolfram Language »

AvogadroConstant

is the number of molecules in one mole or gram molecular weight of a substance.

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To use AvogadroConstant, you first need to load the Physical Constants Package using Needs["PhysicalConstants`"].
AvogadroConstant is given in units of Mole^-1.
Avogadro’s constant is approximately 6.02214199×10²³Mole^-1.

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