• ### 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 6.02×1023 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