| A | B |
| limiting reagent | Any reactant that is used up first in a chemical reaction. |
| excess reagent | Any reactant that remains after the limiting reagent is used up in a chemical reaction. |
| mole ratio | A conversion factor derived from the coefficients of a balanced chemical equation interpreted in terms of moles. |
| theoretical yield | The amount of product that could form during a reaction calculated from a balanced chemical equation. |
| Stoichiometry | The calculation of quantities of substances involved in chemical equations. |
| actual yield | The amount of product that forms when a reaction is carried out in the laboratory. |
| percent yield | The ratio of the actual yield to the theoretical yield for a chemical reaction; a measure of the efficiency of a reaction. |
| the "triangle" | Indicates that heat is supplied to the reaction. |
| conversion factor | A unit of equality that makes it possible to move from one unit of measurement to another. |
| balanced chemical equation | A chemical equation in which mass is conserved; each side of the equation has the same number of atoms of each element. |