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# hw 12 - dziewa(jcd935 – Homework#13 – Holcombe...

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dziewa (jcd935) – Homework #13 – Holcombe – (52460) 1 This print-out should have 15 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points For the reaction 2 NO(g) + 2 H 2 (g) N 2 (g) + 2 H 2 O(g) the following data were collected. [NO(g)] [H 2 (g)] Rate, M/s 0.10 0.10 0.0050 0.10 0.20 0.010 0.10 0.30 0.015 0.20 0.10 0.020 0.20 0.20 0.040 What is the rate law for this reaction? 1. rate = k [H 2 ] 2 [NO] 2. rate = k [H 2 ] [NO] 2 correct 3. rate = k [H 2 ] [NO] 2 4. None of these 5. rate = k [H 2 ] [NO] 6. rate = k [H 2 ] [NO] Explanation: 002 10.0 points A reaction involving reactants A and B is found to occur in the one-step mechanism: 2 A + B -→ A 2 B Write the rate law for this reaction, and predict the effect of doubling the concentra- tion of either reactant on the overall reaction rate. 1. R = k [A] 2 [B]; [A] doubled = the rate will increase fourfold; [B] doubled = the rate will increase fourfold. 2. R = k [A] 2 [B]; [A] doubled = the rate will double; [B] doubled = the rate will double. 3. R = k [A] [B] 2 ; [A] doubled = the rate will double; [B] doubled = the rate will double. 4. R = k [A] 2 [B]; [A] doubled = the rate will increase fourfold; [B] doubled = the rate will double. correct 5. R = k [A] [B] 2 ; [A] doubled = the rate will increase fourfold; [B] doubled = the rate will double. 6. R = k [A] [B] 2 ; [A] doubled = the rate will increase fourfold; [B] doubled = the rate will increase fourfold. 7. R = k [A] 2 [B]; [A] doubled = the rate will double; [B] doubled = the rate will increase fourfold. 8. R = k [A] [B] 2 ; [A] doubled = the rate will double; [B] doubled = the rate will increase fourfold.

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