Answer
d) is the correct answer
Work Step by Step
$$rate = k[A]$$
1. Taking the results in experiment 1.
$$2.2 \times 10^{-3} M/s= k(0.12\ M) $$
$$k = \frac{2.2 \times 10^{-3} M/s}{0.12 \ M} = 0.018 s^{-1}$$
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