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Select the rate law that corresponds to data shown for the following reaction A + B → products.

1. rate = k[B]³
2. rate = k[B]⁴
3. rate = k[A][B]³
4. rate = k[A]²[B]²

Correct answer: rate = k[A][B]³

Solution

The rate law depends on the experimental data, and the given option rate = k[A][B]³ suggests a reaction order consistent with a dependency on both A and B, with B having a cubic influence. This is a plausible rate law for such a reaction.

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