A certain first-order reaction () has a rate constant of 8.70×10−3 at 45 . how many minutes does it take for the concentration of the reactant, , to drop to 6.25 of the original concentration?

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A incontrovertible first-order reaction () has a admonish true of 8.70×10−3 at 45 . how manifold minutes does it siege for the attention of the reactant, , to faint to 6.25 of the ancient attention?

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