engineering chemistry MCQ #4917

For the reaction A -> B, the rate constant is 0.01 min-1. If the initial concentration of A is 1 M, what is [A] after 100 min?

engineering chemistry MCQ #4917

  1. Question 1

    Q1. For the reaction A -> B, the rate constant is 0.01 min-1. If the initial concentration of A is 1 M, what is [A] after 100 min?

    • A) 0.37 M
    • B) 0.1 M
    • C) 0.5 M
    • D) 0.25 M

    Answer: 0.37 M

    Explanation: For a first-order reaction, [A] = [A]0 * e^(-kt) = 1 * e^(-0.01*100) = e^(-1) = 0.37 M.