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A first order reaction has a half-life of 196 seconds at 25oC. How long (in minutes)...

A first order reaction has a half-life of 196 seconds at 25oC. How long (in minutes) does it take for the concentration of the reactant to drop to 3.125% of the original concentration? (it's not 16.34)

The rate constant of a chemical reaction increased from 0.197 s-1 to 3.24 s-1 after raising the temperature from 20.0 oC to 60.0 oC.   What is the activation energy (in kJ/mol) for this reaction? (Hint: Think about what R value to use and what units are being cancelled.) ( the answer is not 56.80)

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