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# What is the value of Avogadro's number?

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## Avogadro number:It is the number of atoms, molecules, and ions in one gram of atom of an element, one gram molecule of a compound, and one gram ion of a substance respectively.Representation of Avogadro number:Avogadro number is represented by the symbol “${\mathrm{N}}_{\mathrm{A}}$”.Value of Avogadro number:Its SI unit is the reciprocal of the mole and its value is ${\mathrm{N}}_{\mathrm{A}}=6.022×{10}^{23}{\mathrm{mol}}^{-1}$, named after the Italian scientist Amedeo Avogadro.This is called the Avogadro constant (or number).

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