Question

For a chemical reaction, half-life period \(t_{1/2}\) is 10 minutes. How much reactant will be left after 20 minutes if one starts with 100 moles of reactant and the order of the reaction is:

• A. zero, (ii) one, and (iii) two?
• B. 0, 25, 33.33
• C. 25, 0, 33.33
• D. 33.33, 25, 0

Hint:

Tip for reaction order problems In reaction order problems, remember the different rate laws for zero, first, and second-order reactions. Zero-order reactions have linear decay, first-order reactions decay exponentially, and second-order reactions decay with the square of time. Use the appropriate formula for each case.