Answer: mol L⁻¹ s⁻¹.
- A mol per litre
- B mol L⁻¹ s⁻¹
- C per second
- D L per mol
Correct answer: B. mol L⁻¹ s⁻¹
Explanation: Rate is a change of concentration with time, so its units are mol L⁻¹ s⁻¹.
First-order decay curve: concentration halves every t½, and that half-life is constant - a defining test for first-order kinetics.
Concept context
Study the speed of reactions and what affects it: concentration, temperature, and catalysts. Covers rate law, order of reaction, the Arrhenius equation, and reaction mechanisms step by step.