1. © 2014 Pearson Education, Inc. Chapter 4 Chemical Quantities and Aqueous Reactions Clicker Questions Allison Soult University of Kentucky

2. © 2014 Pearson Education, Inc. How many moles of CO 2 are produced when 3 moles of pentane react with excess oxygen? C 5 H 12 (l) + 8O 2 (g)  5CO 2 (g) + 6H 2 O(l) a)5 moles b)3/5 moles c)15 moles d)3 moles

3. © 2014 Pearson Education, Inc. How many moles of CO 2 are produced when 3 moles of pentane react with excess oxygen? C 5 H 12 (l) + 8O 2 (g)  5CO 2 (g) + 6H 2 O(l) a)5 moles b)3/5 moles c)15 moles d)3 moles

4. © 2014 Pearson Education, Inc. The overall equation involved in photosynthesis is 6 CO 2 + 6 H 2 O  C 6 H 12 O 6 + 6 O 2. How many grams of glucose (C 6 H 12 O 6, 180.1 g/mol) form when 4.40 g of CO 2 react? a)18.0 g b)3.00 g c)108 g d)0.0167 g

5. © 2014 Pearson Education, Inc. The overall equation involved in photosynthesis is 6 CO 2 + 6 H 2 O  C 6 H 12 O 6 + 6 O 2. How many grams of glucose (C 6 H 12 O 6, 180.1 g/mol) form when 4.40 g of CO 2 react? a)18.0 g b)3.00 g c)108 g d)0.0167 g

6. © 2014 Pearson Education, Inc. The rapid decomposition of sodium azide, NaN 3, to its elements is one of the reactions used to inflate airbags: 2 NaN 3 (s)  2 Na (s) + 3 N 2 (g) How many grams of N 2 are produced from 6.00 g of NaN 3 ? a)3.88 g b)1.72 g c)0.138 g d)2.59 g

7. © 2014 Pearson Education, Inc. The rapid decomposition of sodium azide, NaN 3, to its elements is one of the reactions used to inflate airbags: 2 NaN 3 (s)  2 Na (s) + 3 N 2 (g) How many grams of N 2 are produced from 6.00 g of NaN 3 ? a)3.88 g b)1.72 g c)0.138 g d)2.59 g

8. © 2014 Pearson Education, Inc. The overall equation involved in photosynthesis is 6 CO 2 + 6 H 2 O  C 6 H 12 O 6 + 6 O 2. How many grams of carbon dioxide (CO 2 ) are required to produce 18.0 g of C 6 H 12 O 6 ? a)18.0 g b) 3.00 g c) 54.0 g d) 26.4 g e) 4.40 g

9. © 2014 Pearson Education, Inc. The overall equation involved in photosynthesis is 6 CO 2 + 6 H 2 O  C 6 H 12 O 6 + 6 O 2. How many grams of carbon dioxide (CO 2 ) are required to produce 18.0 g of C 6 H 12 O 6 ? a)18.0 g b) 3.00 g c) 54.0 g d) 26.4 g e) 4.40 g

10. © 2014 Pearson Education, Inc. Ammonia is produced using the Haber process: 3 H 2 + N 2  2 NH 3 Calculate the mass of ammonia produced when 35.0 g of nitrogen react with 12.5 g of hydrogen. a)47.5 g b)42.6 g c)35.0 g d)63.8 g e)70.5 g

11. © 2014 Pearson Education, Inc. Ammonia is produced using the Haber process: 3 H 2 + N 2  2 NH 3 Calculate the mass of ammonia produced when 35.0 g of nitrogen react with 12.5 g of hydrogen. a)47.5 g b)42.6 g c)35.0 g d)63.8 g e)70.5 g

12. © 2014 Pearson Education, Inc. Ammonia is produced using the Haber process: 3 H 2 + N 2  2 NH 3 What percent yield of ammonia is produced from 15.0 kg each of H 2 and N 2, if 13.7 kg of product are recovered? Assume the reaction goes to completion. a)7.53 × 10 –2 % b)1.50 × 10 –1 % c)75.3% d)15.0% e)16.2%

13. © 2014 Pearson Education, Inc. Ammonia is produced using the Haber process: 3 H 2 + N 2  2 NH 3 What percent yield of ammonia is produced from 15.0 kg each of H 2 and N 2, if 13.7 kg of product are recovered? Assume the reaction goes to completion. a)7.53 × 10 –2 % b)1.50 × 10 –1 % c)75.3% d)15.0% e)16.2%

14. © 2014 Pearson Education, Inc. What mass of TiCl 4 is needed to produce 25.0 g of Ti if the reaction proceeds with an 82% yield? TiCl 4 + 2Mg  Ti + 2 MgCl 2 a)30.5 g b)121 g c)99.1 g d)81.2 g

15. © 2014 Pearson Education, Inc. What mass of TiCl 4 is needed to produce 25.0 g of Ti if the reaction proceeds with an 82% yield? TiCl 4 + 2Mg  Ti + 2 MgCl 2 a)30.5 g b)121 g c)99.1 g d)81.2 g

16. © 2014 Pearson Education, Inc. What is the molarity of an aqueous solution containing 22.5 g of sucrose (C 12 H 22 O 11 ) in 35.5 mL of solution? a)0.0657 M b)1.85 × 10 –3 M c)1.85 M d)3.52 M e)0.104 M

17. © 2014 Pearson Education, Inc. What is the molarity of an aqueous solution containing 22.5 g of sucrose (C 12 H 22 O 11 ) in 35.5 mL of solution? a)0.0657 M b)1.85 × 10 –3 M c)1.85 M d)3.52 M e)0.104 M

18. © 2014 Pearson Education, Inc. Sulfuric acid is found in some types of batteries. What volume of 3.50 M H 2 SO 4 is required to prepare 250.0 mL of 1.25 M H 2 SO 4 ? a)17.5 mL b)700. mL c)89.3 mL d)109 mL e)None of the above

19. © 2014 Pearson Education, Inc. Sulfuric acid is found in some types of batteries. What volume of 3.50 M H 2 SO 4 is required to prepare 250.0 mL of 1.25 M H 2 SO 4 ? a)17.5 mL b)700. mL c)89.3 mL d)109 mL e)None of the above

20. © 2014 Pearson Education, Inc. A 45.0 mL solution is 0.500 M HCl. What is the concentration after 25.0 mL of water is added to the solution? Assume volumes are additive. a)0.321 M b)0.179 M c)0.900 M d)0.278 M

21. © 2014 Pearson Education, Inc. A 45.0 mL solution is 0.500 M HCl. What is the concentration after 25.0 mL of water is added to the solution? Assume volumes are additive. a)0.321 M b)0.179 M c)0.900 M d)0.278 M

22. © 2014 Pearson Education, Inc. Which of the following aqueous solutions would conduct electricity? a)AgNO 3 b)C 11 H 22 O 11 (sucrose) c)CH 3 CH 2 OH (ethanol) d)All of the above e)None of the above

23. © 2014 Pearson Education, Inc. Which of the following aqueous solutions would conduct electricity? a)AgNO 3 b)C 11 H 22 O 11 (sucrose) c)CH 3 CH 2 OH (ethanol) d)All of the above e)None of the above

24. © 2014 Pearson Education, Inc. Which of the following compounds will be insoluble in water? a)Ca(OH) 2 b)Na 3 PO 4 c)CaS d)Hg 2 Cl 2 e)LiF

25. © 2014 Pearson Education, Inc. Which of the following compounds will be insoluble in water? a)Ca(OH) 2 b)Na 3 PO 4 c)CaS d)Hg 2 Cl 2 e)LiF

26. © 2014 Pearson Education, Inc. What is the maximum number of grams of PbI 2 precipitated upon mixing 25.0 mL of 0.150 M KI with 15.0 mL of 0.175 M Pb(NO 3 ) 2 ? a)0.864 g b)1.73 g c)1.21 g d)2.07 g e)None of the above

27. © 2014 Pearson Education, Inc. What is the maximum number of grams of PbI 2 precipitated upon mixing 25.0 mL of 0.150 M KI with 15.0 mL of 0.175 M Pb(NO 3 ) 2 ? a)0.864 g b)1.73 g c)1.21 g d)2.07 g e)None of the above

28. © 2014 Pearson Education, Inc. What is the product, if any, when AgNO 3 and NaCl react in aqueous solution? a)AgNO 3 b)NaCl c)AgCl d)NaNO 3 e)No precipitate

29. © 2014 Pearson Education, Inc. What is the product, if any, when AgNO 3 and NaCl react in aqueous solution? a)AgNO 3 b)NaCl c)AgCl d)NaNO 3 e)No precipitate

30. © 2014 Pearson Education, Inc. A 25.0 mL sample of H 2 SO 4 is neutralized with NaOH. What is the concentration of the H 2 SO 4 if 35.0 mL of 0.150 M NaOH are required to completely neutralize the acid? a)0.210 M b)0.105 M c)0.150 M d)0.420 M e)None of the above

31. © 2014 Pearson Education, Inc. A 25.0 mL sample of H 2 SO 4 is neutralized with NaOH. What is the concentration of the H 2 SO 4 if 35.0 mL of 0.150 M NaOH are required to completely neutralize the acid? a)0.210 M b)0.105 M c)0.150 M d)0.420 M e)None of the above

32. © 2014 Pearson Education, Inc. What mass, in grams, of sodium bicarbonate, NaHCO 3, is required to neutralize 1000.0 L of 0.350 M H 2 SO 4 ? a)2.94 × 10 4 g b)1.47 × 10 4 g c)5.88 × 10 4 g d)3.50 × 10 3 g e)1.75 × 10 3 g

33. © 2014 Pearson Education, Inc. What mass, in grams, of sodium bicarbonate, NaHCO 3, is required to neutralize 1000.0 L of 0.350 M H 2 SO 4 ? a)2.94 × 10 4 g b)1.47 × 10 4 g c)5.88 × 10 4 g d)3.50 × 10 3 g e)1.75 × 10 3 g

34. © 2014 Pearson Education, Inc. Determine the oxidation number of the red element in each of the following compounds: H 2 PO 4 – SO 3 2– N 2 O 4 a)+ 6 + 6 + 8 b)+ 5 + 2 + 4 c)+ 5 + 4 + 4 d)+ 5 + 4 + 8 e)+ 6 + 4 + 4

35. © 2014 Pearson Education, Inc. Determine the oxidation number of the red element in each of the following compounds: H 2 PO 4 – SO 3 2– N 2 O 4 a)+ 6 + 6 + 8 b)+ 5 + 2 + 4 c)+ 5 + 4 + 4 d)+ 5 + 4 + 8 e)+ 6 + 4 + 4

36. © 2014 Pearson Education, Inc. Which of the following is a redox reaction? a)HBr (aq) + KOH (aq) → H 2 O (l) + KBr (aq) b)SO 3 (g) + H 2 O (l) → H 2 SO 4 (aq) c)HBr (aq) + Na 2 S (aq) → NaBr (aq) + H 2 S (g) d)NH 4 + (aq) + 2 O 2 (g) → H 2 O (l) + NO 3 – (aq) + 2 H + (aq) e)None of the above

37. © 2014 Pearson Education, Inc. Which of the following is a redox reaction? a)HBr (aq) + KOH (aq) → H 2 O (l) + KBr (aq) b)SO 3 (g) + H 2 O (l) → H 2 SO 4 (aq) c)HBr (aq) + Na 2 S (aq) → NaBr (aq) + H 2 S (g) d)NH 4 + (aq) + 2 O 2 (g) → H 2 O (l) + NO 3 – (aq) + 2 H + (aq) e)None of the above

38. © 2014 Pearson Education, Inc. What is the reducing agent in the following reaction? Zn + 2 MnO 2 + 2 H 2 O → Zn(OH) 2 + 2 MnO(OH) a)Zn b)MnO 2 c)H 2 O d)Zn(OH) 2 e)MnO(OH)

39. © 2014 Pearson Education, Inc. What is the reducing agent in the following reaction? Zn + 2 MnO 2 + 2 H 2 O → Zn(OH) 2 + 2 MnO(OH) a)Zn b)MnO 2 c)H 2 O d)Zn(OH) 2 e)MnO(OH)

40. © 2014 Pearson Education, Inc. Which of the following statements is true? a)An oxidized species gains electrons. b)A reducing agent gains electrons. c)An oxidizing agent gains electrons. d)All of the above are true.

41. © 2014 Pearson Education, Inc. Which of the following statements is true? a)An oxidized species gains electrons. b)A reducing agent gains electrons. c)An oxidizing agent gains electrons. d)All of the above are true.