For the reaction $2A + B \to$ products, the rate law is rate = $k[A]^2[B]$. If [A] is **tripled** and [B] is unchanged, the rate becomes:
A27 ×
B9 ×
C6 ×
D3 ×
Answer & Solution
Correct answer: B. 9 ×
Rate ∝ $[A]^2$ ⇒ tripling [A] gives factor $3^2 = 9$.
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