Iodine atoms combine to form molecular iodine in the gas phase. The rate constant for this reaction is 7.0 x 10^9 1/Ms at 23°C.
a. If the initial concentration of I is 0.086 M, calculate the concentration after 2.0 min.
b. Calculate the half-life of the reaction when the initial concentration of I is 0.60 M and when the initial concentration of I is 0.42 M.