1) A first-order reaction has a half-life of 15.5 s . How longdoes it take for the concentration of the reactant in the reactionto fall to one-eighth of its initial value?
2) The rate constant for a certain reaction is k = 4.30×10−3 s−1. If the initial reactant concentration was 0.350 M, what will theconcentration be after 8.00 minutes?
