A reaction has the rate equation rate = k². What are the units of k when concentrations are in mol dm⁻³ and time is in seconds?
Correct answer A. dm⁶ mol⁻² s⁻¹
Explanation
This is third order overall. k = rate / ([A][B]²) = (mol dm⁻³ s⁻¹) / (mol dm⁻³)³ = mol⁻² dm⁶ s⁻¹.
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