Consider the irreversible reaction
A + 2 B → 3 C .
Which of the following correctly expresses the rate of change of [B] ?
a. Δ[B]Δt=-2 (rate of rxn)
b. Δ[B]Δt= +(rate of rxn)
c. Δ[B]Δt=-12(rate of rxn)
d. Δ[B]Δt=-(rate of rxn)
e. Δ[B]Δt= +12(rate of rxn)
f. Δ[B]Δt= +2 (rate of rxn)
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