Question

A first-order reaction is 25% complete in 30 minutes. How much time will it take for the reaction to be 75% complete? 
 

• A. 90 min
• B. 60 min
• C. 145 min
• D. 120 min

Hint:

\textbf{Tip:} For first-order reactions, use the integrated rate law and logarithmic relationships; log(4) ≈ 0.602, log(1.33) ≈ 0.1249.