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9. A new drug product is found to be ineffective after it has decomposed 30%. The original concentration of one sample was 5.0 mg/ml; when
9. A new drug product is found to be ineffective after it has decomposed 30%. The original concentration of one sample was 5.0 mg/ml; when assayed 20 months later, the concentration was found to be 4.2 mg/mL. Assuming that the decomposition is first order, (i) what should be the expiration time on the label?(2 marks) a.Expiration, 41 months b.Expiration, 20.5 months c. Expiration, 10.25 months d. None of the above (ii). What is the half-life of this product?(1 marks) a.79.5 months b.41 months c. 10.25 months d. 20.5 months
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