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For a zero order reaction, A → products, determine the rate constant r.

1. r = k[A]ⁿ if n = 0
2. r = k[A]⁰
3. r = k[A]¹
4. r = k[A]²

Correct answer: r = k[A]⁰

Solution

For a zero-order reaction, the rate is independent of the concentration of the reactant, so the rate law simplifies to r = k[A]⁰, where [A]⁰ = 1.

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