The Avogadro constant converts amount of substance into a dimensionless entity count: . Its value is exact under the SI definition of the mole. [ref]
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Avogadro's constant, also known as Avogadro's number, is a fundamental physical constant that represents the number of atoms, molecules, or particles in one mole of a substance. It is defined as exactly \(6.02214076 \times 10^{23}\) entities per mole. This value is widely used in chemistry and physics to convert between the macroscopic scale of substances (measured in grams or liters) and the microscopic scale of individual atoms or molecules.