MDCAT Chemistry MCQ #5140

The half-life of a first-order reaction is 20 minutes. What is the rate constant?

MDCAT Chemistry MCQ #5140

  1. Question 1

    Q1. The half-life of a first-order reaction is 20 minutes. What is the rate constant?

    • A) 0.0347 min^(-1)
    • B) 0.693 min^(-1)
    • C) 0.0347 s^(-1)
    • D) 20 min^(-1)

    Answer: 0.0347 min^(-1)

    Explanation: For first-order reactions, k = ln(2)/t1/2 = 0.693/20 = 0.0347 min^(-1).