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Question

A first-order reaction has an initial concentration of 1.0 mol L⁻¹. After 40 minutes, the concentration reduces to 0.25 mol L⁻¹. What is the rate constant?

Options

Choose one · Correct answer highlighted

Explanation

k = (2.303/40) log(1/0.25) ≈ 0.0346 min⁻¹.