| A | B | 
| reactants | the starting materials 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 maximum amount of product that could be formed in a reaction | 
| mole | the amount of a substance that contains 6.02 x 10^23 representative particles of that substance | 
| limiting reagent | the substance completely used up in a chemical reaction | 
| percent yield | the ratio of how much product is produced compared to how much is expected, expressed as a percentage | 
| stoichiometry | the calculations of quantities in a chemical reaction | 
| actual yield | the actual amount of product in a chemical reaction | 
| excess reagent | the substance left over after a reaction takes place | 
| mass-mass calculation | a stoichiometric computation in which the mass of products is determined from the given mass of reactants |