The SI unit of rate of a reaction is:
Aatm s
Bmol L⁻¹ s⁻¹
Cmol L⁻¹
Ds⁻¹
Answer & Solution
Correct answer: B. mol L⁻¹ s⁻¹
Rate has units of (concentration)/(time) = **mol L⁻¹ s⁻¹** in SI. For gas-phase reactions where concentrations are expressed as partial pressures, the units become atm s⁻¹ (or bar s⁻¹).
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