AP Chem Ch 3

actual yield

the measured amount of a product obtained from a reaction

atomic mass

The average mass of all the isotopes of an element

excess reagent

the reactant that is not completely used up in a reaction

limiting reagent

any reactant that is used up first in a chemical reaction; it determines the amount of product that can be formed in the reaction

percent yield

the ratio of the actual yield to the theoretical yield expressed as a percent

percent composition by mass

-percent of a specific compound that is made up of given element

(Mass of element)/(molar mass) X 100

stoichiometric amount

in the proportions indicated by the balanced equation

theorectical yield

the maximum amount of product that can be produced from a given amount of reactant