Happy Mole Day! Celebrate by ... A mole is defined as the base unit of "substance," defined as 6.022*10^ 23 particles (defined as atoms, molecules, ions, or electrons).

A mole is a measurement of a ‘batch’ of particles. It is easier to describe the number of moles of a substance rather than the number of atoms as atoms are very small.

Molality (m), or molal concentration, is the amount of a substance dissolved in a certain mass of solvent. It is defined as the moles of a solute per kilograms of a solvent. [Updated May 4, 2020].

Mole Definition. A mole is a unit of measurement for the amount of substance. One mole contains exactly 6.022×10 23 particles, whether they are atoms, molecules, ions, or electrons. This number ...