A reactant decomposes with a half-life of 163 s when its initial concentration i

Question

A reactant decomposes with a half-life of 163 s when its initial concentration is 0.367 M. When the initial concentration is 0.656 M, this same reactant decomposes with the same half-life of 163 s.

A reactant decomposes with a half-life of 163 s when its initial concentration is 0.367 M. When the initial concentration is 0.656 M, this same reactant decomposes with the same half-life of 163 s. What is the order of the reaction? What is the value and unit of the rate constant for this reaction? Number

Explanation / Answer

from the data it is clear that half life is independent on concentration of reactant

so reaction is first order

order = 1

for first order

K = 0.693 / t1/2

K = 0.693 / 163

K = 4.25 x 10-3s-1

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