Answers: 3
![ln \frac{k_{2}}{k_{1}} = \frac{E_{a}}{R} [\frac{1}{T_{1}} - \frac{1}{T_{2}}]](/tpl/images/0506/0023/2d1b4.png)
= 3 times.
![ln (3) = \frac{E_{a}}{8.314 J/mol K} [\frac{1}{293 K} - \frac{1}{313 K}]](/tpl/images/0506/0023/3da7b.png)
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