Question

Review Constants Periodic Table Part A Learning Goal: To understand how to use integrated rate laws to solve for concentration. A car starts at mile marker 145 on a highway and drives at 55 mi/hr in the direction of decreasing marker numbers. What mile marker will the car reach after 2 hours? . If the initial reactant concentration was 0.600 M, what will The rate constant for a certain reaction is k = 7.70x10s the concentration be after 20.0 minutes? Express your answer with the appropriate units. This problem can easily be solved by calculating how far the car travels and subtracting that distance from the starting marker of 145. View Available Hint(s) 55 mi/hr x 2 hr = 110 miles traveled CHÅR O O ? [A] = Value Units Figure (< 1 of 2 > zero-order Submit Part B A zero-order reaction has a constant rate of 3.10x10 4 M/s. If after 55.0 seconds the concentration has dropped to 6.50x10-2 M, what was the initial concentration? Express your answer with the appropriate units. View Available Hint(s) time

Answer 1

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PART A K= 7.70x1035 Initial concentration (a)=0.6M At t=20min concentration (a-x) =? It is the first order Reaction, . K 2.303 log lambe 7.7x10 23log (1) 000077X1200X 20303 = log1006) -log(a-)) 21-28--00232-logla-ve) log (a-x) = -0.222-21.28 . Ca-x) = antilog (-21.502) Case) = 30 148X1022 m a -