Which two experiments are best used to determine the order of reaction for Cl? By best, we mean "easiest." Experiment 1 2 3 O1 and 3 1 and 2 none of these O2 and 3 Initial [CO] (M) 0.12 0.24 0.24 Initial [Cl] (M) Initial Rate (M/s) 0.20 0.121 0.20 0.241 0.40 0.964