A4(g) -> 4A(g), first-order decomposition. Concentration-time graph shows [A4] and [A] curves inters — Chemical Kinetics Chemistry Question

💡 Solution & Explanation

At intersection: C0*e^-30K = 4*C0*(1-e^-30K) => e^-30K = 0.8. (a) Fraction complete = 0.2 = 20% (correct). (b) K = -ln(0.8)/30 = 0.00743 min^-1; t_1/2 = 93 min ≈ 90 min (correct). (d) Intersection time independent of C0 (correct). (c) Rate decreases exponentially, not linearly.