posted by elvis .
For the reaction, A = B + C, the rate law is kA]. If it takes 80.0 seconds for 70.0% of a 10.0 gram sample of A to be transformed into products, what is the value of the rate constant?
a. 0.00450 s-1 b. 0.0290 s 1 c. 0.00530 s-1 d. 0.0150 s-1 e. 5.40 s-1
chemistry - DrBob222, Friday, February 17, 2012 at 10:06pm
rate = k(A) is first order.
Use ln(No/N) = kt. Substitute and solve for k.