Rate of reactionEasyQuestion 720001
Question
For the reaction 2A + B → C, if [A] decreases at 0.4 mol L⁻¹ s⁻¹, the rate of reaction is:
- A0.2 mol L⁻¹ s⁻¹Correct
- B0.4 mol L⁻¹ s⁻¹
- C0.8 mol L⁻¹ s⁻¹
- D0.1 mol L⁻¹ s⁻¹
Correct answer
0.2 mol L⁻¹ s⁻¹
Explanation
Rate = −(1/2) d[A]/dt = −(1/2)(−0.4) = 0.2 mol L⁻¹ s⁻¹. Each stoichiometric coefficient divides the rate of that species.