A how many elementary steps are in the reaction

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(a) How many elementary steps are in the reaction mechanism? ["", "", "", ""] (b) How many intermediates are in the reaction mechanism? ["", "", "", ""] (c) Which step is rate limiting? ["", "", "", ""] (d) Is the overall reaction exothermic or endothermic? ["", ""] (MTS 2/17/2018)
Answer 1: Correct! 2 Answer 2: Correct! 1 Answer 3: Correct! the second step Answer 4: Correct! exothermic
Question 7 0 / 1 pts Evaluate the specific rate constant at the temperature at which the data were collected. The rate-law expression is rate = k [NO] 2 [H 2 ]. H 2 (g) + 2 NO(g) N 2 O(g) + H (MTS 2/17/2018) Experiment Initial [NO] ( M ) Initial [H 2 ] ( M ) Initial Rate ( M •s –1) 1 0.30 0.35 2.835 x 10 –3 2 0.60 0.35 1.134 x 10 –2 3 0.60 0.70 2.268 x 10 –2 2 O(g)
Question 8 1 / 1 pts Consider the following three-step mechanism for a reaction: Cl 2 (g) 2 Cl (g) Fast Cl (g) + CHCl 3 (g) → HCl (g) + CCl 3 (g) Slow Cl (g) + CCl 3 (g) → CCl 4 (g) Fast What is the predicted rate law?
Question 9 1 / 1 pts Consider the following three-step mechanism for a reaction: Cl 2 (g) 2 Cl (g) Fast Cl (g) + CHCl 3 (g) → HCl (g) + CCl 3 (g) Slow Cl (g) + CCl 3 (g) → CCl 4 (g) Fast Identify the intermediates in the mechanism. Select all that apply. (MTS 2/17/2018) CCl 4 (g) Correct! Cl (g) Correct! CCl 3 (g)
CHCl 3 (g) Cl 2 (g) HCl (g) Question 10 1 / 1 pts Consider the reaction 2 X 2 Y + Z 2 2 X 2 YZ which has a rate law of rate= k[X 2 Y][Z 2 ] Select a possible mechanism for the reaction. (MTS 2/17/2018)
Quiz Score: 8 out of 10

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