A reaction is first-order in the concentration of the reactant i.e. has a rate law: Rate = k[A]. This reaction has a half-life of 102 seconds.

What is the numerical value of k?

How much time (in minutes) will it take for 84.0 % of the reactant to react?

If 0.50 M of reactant is present intially, how much reactant would remain after 5 minutes?

After three half-lives, what percent of reactant will remain?