The number of particles in a substance is given by the Avogadro's number.
The number of particles in a substance is given by the Avogadro's number. The term "mole" was coined by Avogadro in order to assign a numerical value to the number of particles in a substance.
According to Avogadro, one mole of a substance contains 6.02 × 10^23 particles. These particles may be ions, molecules, atoms etc. This value is otherwise known as the Avogadro's number.
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