Answer: zero or a fraction.
- A a value of one
- B a value of two
- C a value of three
- D zero or a fraction
Correct answer: D. zero or a fraction
Explanation: Molecularity is a count of colliding species, so it must be a positive whole number - never zero or a fraction.
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.