| Term | Definition |
| Composition Stoichiometry | Calculations involving the mass relationships of elements in compounds |
| Reaction Stoichiometry | Calculations involvings the mass relationships between reactants and products in a chemical reaction |
| Mole Ratio | A conversion factor that relates the amounts in moles of any two substances involved in a chemical reaction |
| Limiting Reactant | The subsantace that controls the quantity of product that can form in a chemical reaction |
| Excess Reactant | The substance that is not used up completely in a reaction |
| Theoretical Yield | The maxium amount of product that can be produced from a given amount of reactant |
| Actual Yield | The measured amount of a product of a reaction |
| Percentage Yield | The ratio of the actual yield to the theoretical yield, multiplied by 100 |