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Please help - I can't figure this out...
For the reaction A --products, succesive half-lives are observed to be 10.0, 20.0 and 40.0 minutes for an experiment in which [A](original) = 0.10M. Calculate the concentraion of A at the following times:
a) 80.0 minutes
b) 30.0 minutes
According to my book (Zumdahl, 7th edition) the answers are a).011M and b) .025M
It seems to be that at 20 minutes the concentration shoult be .025M? I'm very lost - please explain how to solve the problem. thanks.
For the reaction A --products, succesive half-lives are observed to be 10.0, 20.0 and 40.0 minutes for an experiment in which [A](original) = 0.10M. Calculate the concentraion of A at the following times:
a) 80.0 minutes
b) 30.0 minutes
According to my book (Zumdahl, 7th edition) the answers are a).011M and b) .025M
It seems to be that at 20 minutes the concentration shoult be .025M? I'm very lost - please explain how to solve the problem. thanks.