This is in honor of the only thing I remember from Chemistry, the mole.
The mole is a unit of measurement used in chemistry to express amounts of a chemical substance, equal to about 6.02214×1023 molecules of that substance. It is one of the base units in the International System of Units, and has the unit symbol mol.
From wikipedia: The mole is widely used in chemistry, instead of units of mass or volume, as a convenient way to express the amounts of reagents and products of chemical reactions. For example, the chemical equation 2 H2 + O2 → 2 H2O implies that 2 mol of dihydrogen and 1 mol of dioxygen react to form 2 mol of water. The mole may also be used to express the number of atoms, ions, or other elementary entities in some sample. The concentration of a solution is commonly expressed by its molarity, the number of moles of the dissolved subtance per liter of solution.