Answer: molecularity.
- A the order
- B molecularity
- C the half-life
- D the rate
Correct answer: B. molecularity
Explanation: Molecularity is the number of species colliding in an elementary reaction; it is always a whole number.
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.