Chemistry (CHM 101) Practice Questions (with Answers)

4 PAGES (1104 WORDS) Zoology Exam Question

For a certain first-order reaction, it is found that it takes 156 seconds for the concentration of reactant to fall from 0.100M to 0.0500M. How much time would it take for the concentration of reactant to fall from 0.0500M to 0.0250M?

a. 165 seconds b. 76 seconds c. 156 seconds d. 98 seconds