Answer
rate = k[H2S][Cl2]
therefore the rate with respect to H2S is 1 as the power is one and similarly
Work Step by Step
the rate with respect to [Cl2] is alo 1.
The overall rate is the sum of these values and therefor it is the rate with respect to H2S+ The rate with respect to Cl2 which results in an overall rate of 2.