For a reaction a A + b B → Products, the rate law is found to be: Rate = k [ A ] [ B ] 2 . What is the overall order of the reaction?

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The rate law for the reaction is given as Rate $= k [A] [B]^{2}$ .

The overall order of a reaction is the sum of the exponents of the concentration terms in the rate law expression.

Order with respect to $A = 1$

Order with respect to $B = 2$

Overall order $= 1 + 2 = 3$

Answer: $3$

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