G rate constant Google S x em 146 Relating x mit 1 uestion 11 of 23 (6 points) x

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G rate constant Google S x em 146 Relating x mit 1 uestion 11 of 23 (6 points) x Incorrect X Incorrect COAST Tutorial Problem The rate of the reaction NO cole) Nole) cork) was determined in three experiments at 225 c.The results are given in the following table: Experiment (NO2 o (M) (Colo (M) Initial Rate -ANO2yA (Ms) 0826 1.44x10 5 0.263 0413 1.44x10 5 0.413 5.76x10-5 Answer parts (a). (b), and (c) below (a) Determine the rate law for this reaction. Rate laws kuNOzFICOP click with the mouse, or use the left and right arrow keys to move the cursor out of a superscript or subscript in the module. (b) Calculate the value of the rate constant at 225 C o Hint Check Answer Q Progress 10 Activity Grade: 85 points possible started: Monday, February 6, 2017, 10:46 AM Recorded Description:

Explanation / Answer

from the experimental data it is clear that reaction is second order with respect to nO2

zero order with respect to CO

so rate law as follows

rate = K[NO2]2

K = rate / [NO2]2

K = [1.44 x 10-5] / [0.263]2 = 1.44 x 10-5 / 0.0692

K = 2.08 x 10-4 M-1s-1

c) rate = 2.08 x 10-4 [0.450]2

rate = 4.212 x 10-5 M/s

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