SAPC FQP Exam Practice Questions - SAPC Professional Examination For Foreign-Qualified Persons Exam

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Most small-molecule drugs degrading by hydrolysis follow first-order kinetics. If a solution has a shelf-life (t90) of 24 months at 25 degrees C, what is the most accurate statement about the relationship between t90 and the rate constant k?

t90 = 0.693/k, the half-life expression t90 = 0.105/k, derived from the first-order integrated rate law for 10% loss t90 = k/0.105, an inverse of the correct relationship t90 is independent of k for first-order reactions

Correct Answer:

t90 = 0.105/k, derived from the first-order integrated rate law for 10% loss

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