Order of reaction CAN be determined from:
ABalanced equation
BExperiment (e.g., initial-rates method)
CMolecular weight
DColor of solution
Answer & Solution
Correct answer: B. Experiment (e.g., initial-rates method)
Order must be determined experimentally — cannot be inferred from stoichiometry (except for elementary reactions where order = molecularity). Methods: initial rates, integrated rate law plots, half-life dependence.
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