Erle stanley gardner on your own basic stoichiometry stoichiometry is the measure of the elements within a reaction x research source it involves calculations that take into account the masses of reactants and products in a given chemical reaction stoichiometry is one half on your own basic. If youre seeing this message it means were having trouble loading external resources on our website if youre behind a web filter please make sure that the domains kastaticorg and kasandboxorg are unblocked. If you are given a reaction that does not occur at stp you will have to use the ideal gas law pv nrt to determine the number of moles in the reaction p is pressure in atmospheres v is volume in liters n is the number of moles r is the gas law constant 00821 l atm mol degree and t is the temperature in kelvins. Maclean on your own basic stoichiometry stoichiometry is the measure of the elements within a reaction x research source it involves calculations that take into account the masses of reactants and products in a given chemical reaction stoichiometry is one half math one half balanced equations and