A zero-order reaction has a constant rate of 3.00x104 M/s. If after 40.0 seconds the concentration has dropped to 2.50x10-2 M, what was the initial concentration? Express your answer with the appropriate units. View Available Hint(s) 00 x-a a Xb b [A]o 1.03 10 = Provide Feedback Submit Previous Answers X.10n M X Incorrect; Try Again; 2 attempts remaining Rearrange the equation X [A] = [A]o - kt ? to solve for [A]o. You may want to review Hint 2. Determine the rate constant. Next >