Question

if a reactant is used up according to a first order rate law, and the initial concentration of the reactant is 3.2 mol L-1 , what is the concentration of the r reactant after two half-lives have passed and after six half-lives have passed?

Different Q, For each of the following rate laws, describe what would happen to the reaction rate if the concentration of reactant A was triple and the concentration of reactant B is halved. Rate=k[A] [B] Rate= k [A]2 [B] Rate=k [A]2 [B]2 rate= k [A] [B]3