| Term | Definition |
|---|
| formula mass | the sum of the average atomic masses of all the atoms represented in the formula of any molecule, formula unit, or ion |
| molar mass | the mass of one mole of any substance; atomic mass in grams |
| percent composition | the mass of each element relative to the total mass of the compound. |
| empirical formula | the formula giving the simplest ratio between the atoms of an elements present in a compound |
| molecular formula | gives the type and exact number of each atom in a molecule |
| percent yield | ratio of the actual yield divided by theoretical yield multiplied by 100 |
| actual yield | the amount of product that actually forms when the reaction is carried out |
| theoretical yield | the maximum amount of product that can be produced from a given amount of reactant |
| limiting reactant | the reactant that limits the amount of product that can form in a chemical reaction |
| excess reactant | substance that is not used up completely in a reaction |
| mole ratio | A conversion factor that relates the amounts in moles of any two substances involved in a chemical reaction |
| stoichiometry | an aspect of chemistry involving the calculation of quantities of substances involved in chemical reactions |
| Avogadro's number | 6.022x10^23; the number of particles in 1 mol of a pure substance |
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