A reactant decomposes with a half-life of 155 s when its initial concentration is 0.271 M. When the initial concentration is 0.572 M, this same reactant decomposes with the same half-life of 155 s. What is the order of the reaction? 2 What is the value and unit of the rate constant for this reaction? Units: k = s-1 M.s-1 M-2.s-1 M-.s-1

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