Another Chemistry: rate law problem?

A reaction has a rate constant of 0.0234 sec-1, how much of the compound (in mol/L) is left after 0.466 min, if there was 0.645 mol/L at the start? I figured that this equation would use the first order integrated rate law because of the units of k. However, I still can't get the right answer. The correct... show more A reaction has a rate constant of 0.0234 sec-1, how much of the compound (in mol/L) is left after 0.466 min, if there was 0.645 mol/L at the start?
I figured that this equation would use the first order integrated rate law because of the units of k. However, I still can't get the right answer. The correct numeric answer is 0.335.
I just want the steps to solve this problem so that I can see where I am getting this wrong.
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