Answer: 3 times.
- A 3 times
- B 1 time (equal)
- C 2 times
- D One-third
Correct answer: A. 3 times
Explanation: By stoichiometry, 3 moles of H2 are consumed per mole of N2, so H2 disappears 3 times as fast as N2.
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.