1. Chemistry Released Test Questions 2000 – 2009 Molar Relationships

2. 2000.35. What is the mass of one mole of S 8 ? 1234567891011121314151617181920 21222324252627282930 a.32.1 mg b.32.1 g c.257 g d.4.8 X 10 24 g

3. 2000.36. What is the mass of 2 moles of HgO? 1234567891011121314151617181920 21222324252627282930 1.108g 2.217 g 3.323 g 4.433 g

4. 2000.37 One mole of which of these compounds contains two moles of hydrogen atoms? 1234567891011121314151617181920 21222324252627282930 1.CH 4 2.H 2 S 3.NaOH 4.NH 3

5. 2000.38. A student has one mole of an unknown compound in a test tube. The mass of the compound is 58.5 g. The compound could be — 1234567891011121314151617181920 21222324252627282930 1.CaCl 2 2.NaCl 3.AgNO 3 4.CuCl

6. 2000.39. 1234567891011121314151617181920 21222324252627282930 1.2 2.7 3.9 4.14

7. 2000.40. 1234567891011121314151617181920 21222324252627282930 1.there was not enough hydrogen to react with all of the iodine 2.The hydrogen iodide was reacting with the container 3.iodine loses its reactivity at high temperatures 4.the reaction reached a state of equilibrium

8. 2000.41. 1234567891011121314151617181920 21222324252627282930 a.3.0 b.4.0 c.4.6 d.6.2

9. 2000.42. Which of the following is not a base? 1234567891011121314151617181920 21222324252627282930 a.Al(OH) 3 b.Ca(OH) 2 c.CaSO 4 d.KOH

10. 2000.43. A sample of nitrogen gas is collected over water at 20°C.The vapor pressure of water at 20°C is 18 mmHg. What is the partial pressure of the nitrogen if the total pressure is 765 mmHg? 1234567891011121314151617181920 21222324252627282930 a.18 mmHg b.747 mmHg c.765 mmHg d.783 mmHg

11. 2000.44. A gas has a volume of 50.0 cm 3 at a B temperature of 73°C.What volume would the gas occupy at a temperature of 123°C if the pressure stays constant? 1234567891011121314151617181920 21222324252627282930 a.3.75 cm 3 b.5.0 cm 3 c.37.5 cm 3 d.50.0 cm 3

12. 2000.45. 1234567891011121314151617181920 21222324252627282930 a.1.20 moles b.1.86 moles c.2.0 moles d.12.0 moles

13. 2000.46. 1234567891011121314151617181920 21222324252627282930 a.cool the gas in the balloon only b.increase the temperature of the water c.push the balloon farther down into the water bath d.seal the top of the water bath

14. 2001.14. 1234567891011121314151617181920 21222324252627282930 a.0.102 g b.0.185 g c.1.85 g d.185 g

15. 2001.17. A solution contains 225 g of glucose, C6H12O6, dissolved in enough water to make 0.825 L of solution. What is the molarity of the solution? 1234567891011121314151617181920 21222324252627282930 a.0.66 M b.0.97 M c.1.03 M d.1.52 M

16. 2001.24. How many milliliters of 2.00 M H 2 SO 4 are needed to provide 0.250 mole of H 2 SO 4 ? 1234567891011121314151617181920 21222324252627282930 1.125 mL 2.1.25 x 10 1 mL 3.8.00 x 10 3 mL 4.8.00 mL

17. 2001.28. a.4.00 g b.8.00 g c.16.0 g d.32.0 g 1234567891011121314151617181920 21222324252627282930

18. 2001.31. a.I b.II c.III d.IV 1234567891011121314151617181920 21222324252627282930

19. 2001.35. In the reaction 2SO2 (g)O2 (g) ⇔ 2SO3 (g), which change would cause the greatest increase in the concentration of SO3? a.Decrease the concentration of SO 2 b.Decrease the concentration of O 2 c.Increase the concentration of SO 2 d.Increase the concentration of O 2 1234567891011121314151617181920 21222324252627282930

20. 2001.47. Which volume will be occupied by a gas containing 6.02 x 10 23 atoms at STP? a.1.0 L b.11.2 L c.22.4 L d.44.8 L 1234567891011121314151617181920 21222324252627282930

21. 2001.50. The hydrogen ion concentration is 1 x 10 -7. What is the pH of this solution? a.1 b.7 c.10 d.14 1234567891011121314151617181920 21222324252627282930

22. 2002.8. The pH of a 0.1 molar aqueous solution of HCl would equal ___ 1.-1 2.1 3.11 4.13 12345

23. 2002.17. Which of the following substances is a weak electrolyte? 1.A 2.B 3.C 4.D 12345

24. 2002.18 Carbon disulfide is prepared industrially by reacting carbon with sulfur dioxide according to the equation. If 5.9 moles of carbon react, how many moles of CS2 are produced? 5C + 2SO 2 →CS 2 + 4CO 12345 1.0.077 moles 2.1.2 moles 3.1.5 moles 4.30 moles

25. 2002.27. When copper reacts with silver nitrate according to the equation, the number of grams of copper required to produce 432 grams of silver is Cu(s) + 2AgNO 3 (aq)→Cu(NO 3 ) 2 (aq) + 2Ag(s) 12345 1.31.5 g 2.127 g 3.216 g 4.252 g

26. 2002.28. What is the final concentration if 50.0 mL of a 2.00M solution are diluted to 500.0mL? 12345 1.0.100M 2.0.200M 3.0.400M 4.1.00M

27. 2002.37. How many liters of oxygen are required to produce 2 liters of water at STP? 2H 2 (g) + O 2 (g)→2H 2 O(g) 12345 1.1 2.2 3.3 4.4

28. 2002.40. The molar volume of an ideal gas in liters at STP is 12345 1.6.02 X 1023 L 2.11.2 L 3.22.4 L 4.0.0821 L

29. 2002.43. Which of these is about 2 moles? 12345 1.2.0 liter (dm 3 ) of H 2 2.4.0 grams of H 2 3.2.0 X 10 23 molecules of H 2 4.4.0 kilograms of H 2

30. 2003.16. Which of the following aqueous solutions will cause litmus paper to turn red? 1.NaOH 2.NaCl 3.HCl 4.H 2 O 12345 pH1-678-14 Solution added AcidNeutra l Base Litmus paper changes from Blue to red Does not chang e Red to blue

31. 2003.21 A solution which has a concentration that exceeds its predicted solubility at a certain temperature and pressure would be--- 12345 1.Unsaturated 2.Saturated 3.Supersaturated 4.Dilute

32. 2003.26 What is the molarity of a solution prepared by dissolving 27.2g of sodium chloride in enough water to prepare 500.0mL of solution? 12345 1.0.186 M 2.0.465 M 3.0.930 M 4.1.860 M

33. 2003.30. Zn + 2HCl→ZnCl 2 + H 2 If 0.600 gram of zinc is used, what is the amount of zinc chloride that is produced in the above reaction? 12345 1.0.125 g 2.1.25 g 3.12.5 g 4..018 g

34. 2003.43. What is the density of carbon dioxide at STP? 12345 1.1.96 g/L 2.22.0 g/L 3.46.0 g/L 4.5.09 X 10 ­1 g/L

35. 2003.44. When magnesium metal (Mg) is burned, it forms MgO. How many moles of oxygen gas (O 2 ) are needed to burn 10 moles of Mg? 12345 1.2 2.5 3.10 4.20

36. 2003.45. Nitrogen gas is a diatomic molecule. What is the mass of one mole of nitrogen gas? 12345 1.7 g 2.14 g 3.28 g 4.6 X10 23 g

37. 2003.49. Ulcers are often caused by an excess of stomach acid. Milk of magnesia is often used to soothe the irritation. Milk of magnesia is probably--- 12345 1.An acid 2.A base 3.An indicator 4.A colloid

38. 2004.2. How many grams of sodium chloride are required to prepare 500.0 mL of a 0.100 M solution? 1234567891011121314151617181920 212223242526272829303132 A.1.46 g B.2.93 g C.29.3 g D.58.5 g

39. 2004.10. How many grams of product Z will be formed if 12.0 g of W react with 10.0 g of X to form 8.0 g of product Y in the reaction shown? 1234567891011121314151617181920 212223242526272829303132 A.8.0 g B.10.0 g C.12.0g D.14.0 g

40. 2004.16. The gas with the largest volume at STP is 1234567891011121314151617181920 212223242526272829303132 A.10.0 g He B.10.0 g Ne C.10.0 g Ar D.10.0 g Kr

41. 2004.24. What is represented by the pH of a solution? 1234567891011121314151617181920 212223242526272829303132 A.Partial pressure of hydrogen ion in the solution B.Electronegativity of dissociated hydrogen ions in the solution C.Concentration of hydrogen ions in the solution D.Temperature of hydrogen ions in the solution

42. 2004.34. How many grams of nitrogen are present in 2 moles of HNO 3 ? 1234567891011121314151617181920 212223242526272829303132 A.1 B.2 C.14 D.28

43. 2004.42. How many moles of copper are equivalent to 3.44 x 10 23 atoms of copper? 1234567891011121314151617181920 212223242526272829303132 A.0.571 moles B.1.75 moles C.5.41 x 10 21 moles D.5.41 x 10 22 moles

44. 2004.44. What is the molar mass of Al(No 3 ) 3 ? 1234567891011121314151617181920 212223242526272829303132 A.57 g/mol B.103 g/mol C.165 g/mol D.213 g/mol

45. 2004.46. What is the mass in grams of one mole of sulfur dioxide (SO) 2 ? 1234567891011121314151617181920 212223242526272829303132 A.48.1 g B.64.1 g C.80.1 g D.96.1 g

46. 2005.3. What mass of potassium hydroxide is required to react completely with 2.70 g of sulfuric acid to produce potassium sulfate and water? 1234567891011121314151617181920 212223242526272829303132 A.4.73 g B.3.09 g C.2.36 g D.1.54 g

47. N23H2 → 2NH3 2005.15. If 6 liters of hydrogen gas are used, how many liters of nitrogen gas will be needed for the above reaction at STP? 1234567891011121314151617181920 212223242526272829303132 A.2 liters B.3 liters C.4 liters D.12 liters

48. 2005.18. Formaldehyde (H2CO) reacts with oxygen to form CO2 and H2O. How many moles of CO2 will be produced from reacting 2 moles of H2CO with oxygen? 1234567891011121314151617181920 212223242526272829303132 A.1 B.2 C.4 D.8

49. 2005.19. Which pair of solutions would be acidic if mixed in equal quantities? 1234567891011121314151617181920 212223242526272829303132 A.A and B B.B and C C.B and D D.C and D

50. 2005.29. A container holds30.0 grams of neon gas. Under the same conditions, how many grams of xenon would the container hold? 1234567891011121314151617181920 212223242526272829303132 A.108 g B.131 g C.262 g D.370 g

51. 2005.30. In the combustion of ethane, how many moles of CO 2 can be produced from 1.00 of C 2 H 6 ? 1234567891011121314151617181920 212223242526272829303132 A.0.5000 mole B.1.00 mole C.2.00 moles D.4.00 moles

52. 2005.33. Which is the base in the reaction? 1234567891011121314151617181920 212223242526272829303132 A.H 2 O B.KOH C.K + D.H 2 SO 4

53. 2005.39. Which condition will cause a shift in the equilibrium of the above reaction? 1234567891011121314151617181920 212223242526272829303132 A.Double the concentration of reactants and products B.Increase the reaction temperature C.Reduce the concentration of products and reactants by 10% D.Keep the reaction temperature constant

54. 2007.3. What is the mass of a mole of Ca(OH)2? 1234567891011121314151617181920 21222324252627282930 1.57 grams 2.58 grams 3.74 grams 4.114 grams

55. 2007.7. The equation shows the combustion of butane (C 4 H 10 ). How many moles of water can be produced by 12.5 moles of C 4 H 10 with excess oxygen? 1234567891011121314151617181920 21222324252627282930 1.2.50 mol 2.62.5 mol 3.125 mol 4.202 mol

56. 2007.13. What mass of nitrogen is required to react with 16 grams of oxygen? 1234567891011121314151617181920 21222324252627282930 1.2.8 g 2.5.6 g 3.14 g 4.56 g

57. 2007.19. What is the molar mass of beryllium oxide (BeO)? 1234567891011121314151617181920 21222324252627282930 1.12 g/mol 2.13 g/mol 3.24 g/mol 4.25 g/mol

58. 2007.25. If 5.0 moles of C 3 H 8 react, how many molecules of water are formed? 1234567891011121314151617181920 21222324252627282930 1.3.0 x 10 24 2.4.8 X 10 24 3.1.2 x 10 25 4.2.4 x 10 25

59. 2007.43. What does pH measure? 1234567891011121314151617181920 21222324252627282930 1.Hydrogen ion concentration 2.Hydroxide ion concentration 3.Acid density 4.Base density

60. 2007.47. A 0.67 L solution of ammonium sulfate, (NH 4 ) 2 SO 4, contains 0.81 mole of the solute. What is the approximate molarity of the solution? 1234567891011121314151617181920 21222324252627282930 1.0.54 M 2.0.83 M 3.1.2 M 4.1.5 M

61. 2007.50. NO 2 and N 2 0 4 undergo the reaction shown. When a sealed container of NO 2 reaches chemical equilibrium, which must be true? 1234567891011121314151617181920 21222324252627282930 1.No N 2 0 4 is present 2.No chemical reactions are occurring 3.The rates of the forward and reverse reactions are equal 4.The maximum number of molecules ahs been reached

62. 2008.4. The name of the salt formed by the neutralization of hydrochloric acid and sodium hydroxide is 1234567891011121314151617181920 212223242526272829303132 A.Sodium chloride B.Sodium chlorate C.Sodium chlorite D.Sodium hypochlorite

63. 2008.7. A balloon is filled with 3.8 L of helium gas at STP. Approximately how many moles of helium are contained in the balloon? 1234567891011121314151617181920 212223242526272829303132 A.0.17 mol B.0.26 mol C.72 mol D.85 mol

64. 2008.9. If 250.0 mL of a 0.96 M solution of acetic acid (C 2 H 4 O 2 ) are diluted to 800.0 mL, what will be the approximate molarity of the final solution? 1234567891011121314151617181920 212223242526272829303132 A.0.19 M B.0.24 M C.0.30 M D.0.77 M

65. 2008.19. What is the mass of one more of CO 2 ? 1234567891011121314151617181920 212223242526272829303132 A.24 g B.28 g C.44 g D.56 g

66. 2008.33. Which of the following solutions will have the greatest concentration? 1234567891011121314151617181920 212223242526272829303132 A.2 moles of solute dissolved in 1 liter of solution B.0.3 mole of solute dissolved in 0.6 liter of solution C.2 moles of solute dissolved in 10 liters of solution D.0.1 mole of solute dissolved in 0.5 liter of solution

67. 2008.44. How many moles of hydrogen gas are produced when 0.066 mole of sodium is completely reacted? 1234567891011121314151617181920 212223242526272829303132 A.0.022 mol H 2 B.0.033 mol H 2 C.0.066 mol H 2 D.0.099 mol H 2

68. 2008.46. A 1.0 M aqueous solution of which substance would have the lowest pH? 1234567891011121314151617181920 212223242526272829303132 A.NH 3 B.HCI C.Ba(OH) 2 D.NaF

69. 2008.49. Phospohric acid, H 3 PO 4, is neutralized by magnesium hydroxide, Mg(OH) 2, according to the equation shown. How many moles of water will be produced from the neutralization of 0.24 mole of H 3 PO 4 ? 1234567891011121314151617181920 212223242526272829303132 A.0.24 mol B.0.48 mol C.0.72 mol D.1.44 mol

70. 2009.8. When 1 g of sodium chloride (NaCl) is placed in 100 g of water, a solution results. Once the solution is prepared, water is now considered what part of the solution? 1234567891011121314151617181920 21222324252627282930 1.Solid 2.Liquid 3.Solute 4.Solvent

71. 2009.18. 1234567891011121314151617181920 21222324252627282930 1.1.28 g 2.2.55 g 3.3.85 g 4.32.5 g

72. 2009.24. What is the volume occupied by 51.0 g of ammonia (NH 3 ) gas at STP? 1234567891011121314151617181920 21222324252627282930 1.0.439 L 2.22.8 L 3.67.2 L 4.91.9 L

73. 2009.39. 1234567891011121314151617181920 21222324252627282930 1.16 grams 2.18 grams 3.36 grams 4.44 grams

74. 2009.42. When 80 g of sodium hydroxide, NaOH, are dissolved in enough water to make 500 mL of solution, the molarity of the solution is 1234567891011121314151617181920 21222324252627282930 1.1 M 2.2 M 3.4 M 4.8 M

75. 2009.44. If the pH of a solution is 4, what is the pOH? 1234567891011121314151617181920 21222324252627282930 1.0 2.6 3.7 4.10

76. 2009.49. The number of molecules in 48.0 grams of oxygen gas (O 2 ) is 1234567891011121314151617181920 21222324252627282930 1.6.02 x 10 23 2.9.03 x 10 23 3.1.20 x 10 24 4.1.81 x 10 24