What are the units of the rate constant for a second-order reaction?
Correct answer B. dm³ mol⁻¹ s⁻¹
Explanation
k = rate / [A]² = (mol dm⁻³ s⁻¹) / (mol dm⁻³)² = mol⁻¹ dm³ s⁻¹. First-order k has s⁻¹, zero order has mol dm⁻³ s⁻¹.
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