A+ b → c select the rate law for the reaction above using the following information: holding the concentration of a constant and doubling the concentration of b results in the rate of the reaction increasing from 1.5e-3 m/s to 1.2e-2 m/s. keeping the concentration of b constant and doubling a results in the rate of the reaction increasing from 1.5e-3 m/s to 3.0e-3 m/s.