in order to use a volume ratio in a stoichiometry problem, the reaction must take place at stp.\na true\nb…

Brief Explanations:

Volume - volume stoichiometry can be done at non - STP conditions as long as the temperature and pressure are constant for all reactants and products. The volume ratio in stoichiometry is based on the mole ratio from the balanced chemical equation and the ideal gas law ($PV = nRT$). When $T$ and $P$ are constant, $V$ is directly proportional to $n$.

Answer:

b. FALSE