Chem2 hw11 - Yoon, Seong Meen Homework 11 Due: Dec 5 2007,...

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Unformatted text preview: Yoon, Seong Meen Homework 11 Due: Dec 5 2007, 11:00 pm Inst: James Holcombe 1 This print-out should have 28 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. The due time is Central time. 001 (part 1 of 1) 10 points For a reaction that is zero-order overall, 1. the rate does not change during the reac- tion. 2. the rate constant is zero. 3. the activation energy is zero. 4. the reactant concentration does not change with time. 002 (part 1 of 1) 10 points The rate of the reaction 2O 3 3O 2 is equal to 1.- 1 2 [O 3 ] t . 2.- 1 3 [O 2 ] t . 3. + 1 2 [O 3 ] t . 4.- [O 3 ] t . 5.- [O 2 ] t . 003 (part 1 of 1) 10 points When we speak of the rate of a reaction, we are referring to 1. the instantaneous rate. 2. the integrated rate. 3. the minimum rate. 4. the average rate. 5. the maximum rate. 004 (part 1 of 1) 10 points Consider the elementary reaction H + Br 2 HBr + Br The rate of production of HBr would be reliably aproximated as simple first order if 1. [H] is small and [Br 2 ] is small. 2. [H] and [Br 2 ] are about equal. 3. [H] is small and [Br 2 ] is large. 4. first order will never be a good approxi- mation. 5. [H] is large and [Br 2 ] is large. 005 (part 1 of 1) 10 points Consider the reaction 2NO 2 (g) + F 2 (g) 2NO 2 F(g) rate =- [F 2 ] t . What is another form of the rate of the reaction? 1. [NO 2 F] 2 t 2.- [NO 2 ] t 3. [NO 2 F] t 4. [NO 2 ] 2 t 5.- 2[NO 2 ] t 006 (part 1 of 1) 10 points For the reaction 2NO(g) + 2H 2 (g) N 2 (g) + 2H 2 O(g) Yoon, Seong Meen Homework 11 Due: Dec 5 2007, 11:00 pm Inst: James Holcombe 2 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 ] [NO] 2 2. rate = k [H 2 ][NO] 3. None of these 4. rate = k [H 2 ][NO] 2 5. rate = k [H 2 ] 2 [NO] 6. rate = k [H 2 ] [NO] 007 (part 1 of 3) 10 points Manganate ions (MnO 2- 4 ) react at 2.0 mol L min in acidic solution to form per- manganate ions and manganese(IV) oxide: 3 MnO 2- 4 (aq) + 4 H + (aq) 2 MnO- 4 (aq) + MnO 2 (s) + 2 H 2 O( ) What is the rate of formation of perman- ganate ions?...
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Chem2 hw11 - Yoon, Seong Meen Homework 11 Due: Dec 5 2007,...

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