The order of a reaction is defined as:
AEqual to the molecularity
BThe sum of the exponents of concentration terms in the experimental rate law
CThe sum of stoichiometric coefficients of all reactants
DThe total number of molecules in the balanced equation
Answer & Solution
Correct answer: B. The sum of the exponents of concentration terms in the experimental rate law
**Order** = sum of the powers (exponents) of concentration terms in the **experimentally determined** rate law: for Rate = k[A]^x [B]^y, order = x + y. Can be **0, integer, or fractional**.
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