
Conversion Factor
A ratio (or fraction) that represents the relationship between two different units.

Formula Unit
The representative particle of a substance. It is the smallest unit of a substance that still retains that substance's properties and is the simplest way to write the formula of the substance without coefficients.

Gram Formula Mass
The mass of one mole of compound.

Gram Molecular Mass
The mass of one mole of a molecular substance.

Mole
A measure of amount. 1 mole equals 6.02×10^{23} items of something. The number is so massive because moles are used to measure the amount of molecules, atoms, and other incredibly miniscule particles.

Mole ratio
The ratio between any two constituents in chemical equation

Standard Temperature and Pressure
The arbitrarily decided standard conditions at which experiments are done: 1 atm and 273 degrees Kelvin (0 degrees Celsius).

General Conversion Factor Equation
Conversion Factor =

Converting from Formula Units to Moles
Moles =

Converting from Volume of a Gas to Moles
moles =

Converting from Mass to Moles
Moles =

Converting from Molality of a Solution to Moles
Moles = molality × kilograms of solution

Converting from Molarity of a Solution to Moles
Moles = molarity × liters of solution