Assume that the reaction represented by the equation A → products is second order in A with a rate constant of 8.5×10-2 M-1·s-1. What is the concentration of A after a reaction time of 5s if the initial concentration of A was 7.0 M? Enter your result in M, without the unit, to a precision of 0.1M.

(1/CA)-(1/7M)=8.5*10-2M-1s-1*5s
(1/CA)=(8.5*10-2M-1*5)+(1/7)M-1
(1/CA)=0.56785714286M-1
CA=1.761
Assume that the reaction represented by the equation A → products is second order in A...
Assume that the reaction represented by the equation A → products is first order in A, with a rate constant of k = 1.246×10-3 s-1. If the initial concentration of A is {y} M, how much time does it take for the concentration to drop to 30% of the initial value? Enter your result in seconds, without the unit, to a precision of 0.1 seconds.
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need help with both questions!!!!
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