Calculate the shelf life of the drug solution at 25°C, assuming the degradation of the drug follows first-order reaction kinetics   where the concentration decreases with time as follows: ln Ct = ln C0 - k.t and k = 0.0034 day-1

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A: R1 = 4.17 ohm R2 = 12.5 ohm E = 12.3 volts time = 2.23 min = 133.8 sec

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