For the hypothetical reaction A + 3B → 2C, the rate should be expressed as
A) rate = Δ[A]/Δt.
B) rate = -Δ[C]/Δt.
C) rate = -3(Δ[B]/Δt).
D) rate = (1/2)(Δ[C]/Δt).
E) rate = (1/3)(Δ[B]/Δt).

Question

Quizplus · Accepted Answer

The rate of a reaction is often expressed in terms of the change in concentration of products over time. For the given reaction, A + 3B → 2C, the rate can be expressed as the change in concentration of C over time, divided by the stoichiometric coefficient of C in the balanced equation. Since 2 moles of C are produced, the rate is (1/2)(Δ[C]/Δt), which accounts for the stoichiometry of the reaction.

For the Hypothetical Reaction a + 3B → 2C, the Rate