35.
For a certain first order reaction, it is found that is takes 156 seconds for the concentration of reactant to fall from 0.100 M to 0.0500 M. How much time would it take for the concentration of reactant to fall from 0.0500 M to 0.0250 M?
A:
312s
B:
76s
C:
156s
D:
436s
The answer is:
C
