For the reaction A + B → P with rate law rate = $k[A]^2[B]$, $k = 6.25$ M⁻² s⁻¹ at 25 °C. The rate when $[A] = 1.0$ M, $[B] = 0.2$ M is:
A0.625 M s⁻¹
B1.25 M s⁻¹
C6.25 M s⁻¹
D12.5 M s⁻¹
Answer & Solution
Correct answer: B. 1.25 M s⁻¹
rate = $k[A]^2[B] = 6.25 \times (1.0)^2 \times 0.2 = 1.25$ M s⁻¹.
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