A zero-order reaction takes 50 s to reduce the concentration from 0.2 mol L⁻¹ to 0.15 mol L⁻¹. What is the rate constant

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A zero-order reaction takes 50 s to reduce the concentration from 0.2 mol L⁻¹ to 0.15 mol L⁻¹. What is the rate constant?

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5.0 × 10⁻⁴ mol L⁻¹ s⁻¹ 1.5 × 10⁻³ mol L⁻¹ s⁻¹ 2.0 × 10⁻³ mol L⁻¹ s⁻¹ 1.0 × 10⁻³ mol L⁻¹ s⁻¹ Correct

k = ([R]₀ − [R])/t = 0.05/50 = 1.0 × 10⁻³ mol L⁻¹ s⁻¹.

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