The activation energy for a reaction is \( 9.0 \mathrm{kcal} / \mathrm{mol} \). The increase in ...

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The activation energy for a reaction is \( 9.0 \mathrm{kcal} / \mathrm{mol} \). The increase in the rate constant when its temperature is increased from \( 298 \mathrm{~K} \) to \( 308 \mathrm{~K} \) is
(a) \( 63 \% \)
(b) \( 50 \% \)
(c) \( 100 \% \)
(d) \( 10 \% \)
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