Answer: Determined experimentally.
- A Usually equal to molecularity
- B Determined experimentally
- C Usually a whole number
- D Fixed for all reactions
Correct answer: B. Determined experimentally
Explanation: Order is determined from experimental rate data, not from the stoichiometric coefficients.
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.