Definition:Amount of Substance/Units

Definition

The SI unit of measurement of amount of substance is the mole $\mathrm {mol}$.

The CGS unit of measurement of amount of substance is the gram-mole $\mathrm {g \, mol}$.

The FPS unit of measurement of amount of substance is the pound-mole $\mathrm {lb \, mol}$.

Mole

The mole is the SI base unit of amount of substance.

It is defined as exactly Avogadro's number of particles, that is, $6 \cdotp 02214 076 \times 10^{23}$.

Gram-Mole

The gram-mole is the CGS unit of amount of substance.

It is defined as the number of atoms in $12$ grams of carbon-$12$.

Kilogram-Mole

The kilogram-mole is an MKS unit of amount of substance.

It is defined as the number of atoms in $12$ kilograms of carbon-$12$.

Pound-Mole

The pound-mole is the FPS unit of amount of substance.

It is defined as the number of atoms in $12$ pounds avoirdupois of carbon-$12$.