TA practice quiz 4 - some stoichiometry which you may not...

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CH301 Fall 2010 Practice Quiz 4 1. When N 2 + ionizes (gains 2 electrons) to form N 2 - , its bond order would. .. 1. change from 2.5 to 3.5 2. change from 2.5 to 3 3. not change 4. change from 3 to 2 5. change from 3.5 to 2.5 2. Which of the species below is paramagnetic? I. O 2 + II. O 2 III. O 2 - 1. I 2. II 3. III 4. I and II 5. I and III 6. II and III 7. I, II and III 3. Based on simple bond order arguments, which two of the species below would be most similar in bond length? I. H 2 II. B 2 - III. C 2 IV. F 2 + 1. I and II 2. I and III 3. I and IV 4. II and III 5. II and IV 6. III and IV 4. Which of the following species has the fewest delocalized electrons? 1. carbonate (CO 3 2- ) 2. phosphate (PO 4 3- ) 3. sulfur dioxide (SO 2 ) 4. benzene (C 6 H 6 ) 5. Consider the reaction below: Ca(OH) 2 (aq) + 2 NH 4 Cl(s) CaCl 2 (s) + 2 NH 3 (g) + 2H 2 O(l) If 2 moles of NH 4 Cl salt is added to 2 liter of a 1 M solution of Ca(OH) 2 , what volume will the gaseous products occupy at STP? (This is a limiting reagent question and requires you to do
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Unformatted text preview: some stoichiometry which you may not have done in a long time. It is also a lot harder than what youll see on the quiz, but fair game for the exam.) 1. 22.4 L 2. 44.8 L 3. 89.6 L 4. not enough information 6. Which of the following would cause a systems volume (V) to double? I. halving the temperature (T) II. doubling the pressure (P) III. doubling the number of moles (n) 1. I 2. II 3. III 4. I and II 5. I and III 6. II and III 7. I, II and III 7. Which gaseous species below would have the greatest kinetic energy at room temperature? 1. ammonia (NH 3 ) 2. methane (CH 4 ) 3. chloroform (CHCl 3 ) 4. All of these would have the same kinetic energy. 8. Which of the following gases would behave the most ideally? 1. steam (H 2 O) 2. dihydrogen (H 2 ) 3. dinitrogen (N 2 ) 4. carbon monoxide (CO) 5. All of these would behave completely ideally....
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TA practice quiz 4 - some stoichiometry which you may not...

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