Answer: 6.93 min.
- A 6.93 min
- B 0.693 min
- C 10 min
- D 1 min
Correct answer: A. 6.93 min
Explanation: t½ = 0.693/k = 0.693/0.1 = 6.93 min. For first-order reactions, t½ is constant.
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.