# What are moles in chemistry?

Jul 27, 2016

See explanation.

#### Explanation:

Mole is a unit of quantity used in chemistry.

From Wikipedia:

It is defined as the amount of a chemical substance that contains as many elementary entities, e.g., atoms, molecules, ions, electrons, or photons, as there are atoms in 12 grams of carbon-12 (""^12 C)

This number is expressed by the Avogadro constant, which has a value of 6.022140857×10^23