A gaseous reaction has the rate law rate = k[A]^2[B] Termolecular collisions are…

CHEMISTRY · Single correct · A Level · Chemistry · Rate equations · Rate equations

Problem

A gaseous reaction has the rate law rate = k[A]^2[B] Termolecular collisions are rarely observed, so chemists consider alternative one-step stoichiometries that could still produce the measured rate law. Which proposed elementary step is most consistent with the data and avoids invoking a termolecular collision? (a) A+A+B  →  productsA + A + B \;\rightarrow\; \text{products} (b) A+AB  →  productsA + AB \;\rightarrow\; \text{products} (c) A2+B  →  productsA_{2}+B\;\rightarrow\;\text{products} (d) A+B  →  productsA + B \;\rightarrow\; \text{products}

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