1 Afirst order reaction was experimentally determined to follow the rate law, Rate = k[A] where k = 0.15 s-1. Starting with initial concentration of [A]i = 0.225M, what is the final concentration [A]f,after 12 seconds? O 0.035 M O 0.055 M 0.015 M O 0.075 M 5 points Save