Significance of Avogadro’s Number
Avogadro’s number is related to the quantity and number of particles in a substance, which describes the link between the macroscopic and microscopic worlds.
Additionally, it provides the relationship between several physical constants and their characteristics, including
Gas constant and Boltzmann constant:
R = NAkA
where
NA represents the Avogadro number
R represents the gas constant
kA represents the Boltzmann constant
Faraday constant and the electron charge:
F = eNA
where
e represents the electron charge
F represents the Faraday constant
Atomic Mass Constant and Molar Mass Constant:
Mu = NA(1u)
where
Mu represents the molar mass constant
1u represents the atomic mass constant
Avogadro’s Number
Avogadro’s number, also known as Avogadro’s constant or number, is a fundamental constant in chemistry, denoted by NA, which honors the great pioneer Amedeo Avogadro. It refers to the number of units of atoms, molecules, or ions in one mole of a substance, and has been empirically established as 6.0221367 × 1023. This constant is always expressed in chemistry using the unit “per mole”. Therefore, regardless of the substance in question, one mole of it is always equal to NA.