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Multiple choice question about half lives and rate constants.

What is the half-life for a first order reaction with a rate constant of 0.573s(to the negative 1)?
a. 1.21s
b. 0.827s
c. 1.25s
d. 0.278s
e. 3.49s

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If the reaction is 1st order we can directly say that there exists a linear relation between the ln(A) and t (A is the concentration of the reactant in the reaction). The equation ...

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The solution provides the answer, work and an explanation.