A major reason we balance equations is to find the ratio between substances in the equation. The coefficients represent the ratios of substances. We often think of the coefficients as *moles*. The ratio is called the **Mole Ratio**.

The mole ratio is the key to equation stoichiometry.

- The mole ratio is the
**only**time we use the coefficients from a balanced equation in stoichiometry. - The mole ratio is at the center of equation stoichiometry.
- In solving typical stoichiometry problems we convert grams of the given substance to moles, then use the
**mole ratio**to get moles of the desired quantity, and then convert these moles to grams.

- Calculating Molar Mass
- Mole Conversions (Moles to Grams/Molecules/Liters)
- Balancing Chemical Equations
- Equation Stoichiometry (Mass to Mass, etc.)
- Textbooks: ChemLibre, OpenStax, CK12

In stoichiometry, we only use the coefficients in the Mole Ratio. We can think of the coefficients as moles!

One way to find the the mole ratio is:

We get the coefficients from the balanced equation.