engineering chemistry MCQ #4913

For a reaction A -> B, the rate law is rate = k[A]. If [A]0 = 1 M and k = 0.1 min^-1, [A] after 10 min is

engineering chemistry MCQ #4913

  1. Question 1

    Q1. For a reaction A -> B, the rate law is rate = k[A]. If [A]0 = 1 M and k = 0.1 min^-1, [A] after 10 min is

    • A) 0.368 M
    • B) 0.135 M
    • C) 0.5 M
    • D) 0.1 M

    Answer: 0.368 M

    Explanation: For first-order, [A] = [A]0 * e^(-kt) = 1 * e^(-0.1*10) = e^(-1) = 0.368 M.