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If the oxygen demand remaining in a water sample was 50mg/L after 4 days. The standard...

If the oxygen demand remaining in a water sample was 50mg/L after 4 days. The standard reaction rate constant (k) has been found to be 0.19 d-1.
1) Predict the BOD after 7 days.
2) If the temperature of the sample was 28°C, calculate the remaining oxygen demand after 7 days.

please solve it correct .

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