2 EXAM VERSION A
CH 313 N
Date: 10/26/2007
1. The chemical formula for cocaine is C17H21NO4. What is the percent carbon in cocaine? A) 32.2 B) 67.3 C) 8.43 D) 46.7 2. Analysis of calcium carbide showed its mass composition is 62.5% calcium and 37.5% carbon. What is its empirical formula? A) CaC2 B) Ca2C C) CaC D) Ca3C2 3. Consider the balanced equation: 3NaHCO3 + C6H8O7 3CO2 + 3H2O + Na3C6H5O7 What mass of CO2 is produced when 200 g of NaHCO3 undergoes reaction? A) 105 g B) 183 g C) 210 g D) 315 g 4. Which of these compounds is not a strong acid? A) HCl B) H2SO4 C) HNO3 D) H2SO3 5. A gas occupies a volume of 525 mL at a pressure of 1.00 atm. What is the new volume of the gas when the pressure is doubled? A) 104 mL B) 263 mL C) 345 mL D) 760 mL
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6. In a solution with pH = 7.0: A) [H3O+] = [OH] B) [H3O+] > [OH] C) [H3O+] < [OH] D) [H3O+] + [OH] = Kw 7. A gas under 33.30 atm pressure occupies 30.00 L at 273C. What is the volume of the gas at STP (1 atm & 0oC)? A) 259 L B) 500 L C) 1000 L D) 2000 L 8. What is a sphygmomanometer used for? A) measuring blood pressure B) measuring pressure inside the eye C) measuring masses D) examining the ear canal 9. In which state of matter are molecules extremely far apart and disordered? I Solid II Liquid III Gas A) I only B) II only C) III only D) II and III only 10. Which solution is the most acidic? A) blood B) vinegar C) milk D) detergent
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11. In which state of matter are molecules packed as closely together as possible? I Solid II Liquid III Gas A) I only B) II only C) III only D) I and II only 12. In which state does matter undergo a large change in volume on heating? I Solid II Liquid III Gas A) I only B) II only C) III only D) II and III only 13. What is the equilibrium constant expression for this reaction? aA(aq) + bB(aq) + cC(aq) dD(l) + eE(s) a b c d e A) [A] [B] [C] [D] [E] B) [A]a[B]b[C]c C) 1 / [A]a[B]b[C]c D) [D]d[E]e / [A]a[B]b[C]c 14. Which solution is the most basic? A) blood B) vinegar C) milk D) household ammonia 15. Which secondary force would be expected to hold together the particles of a liquid with a very low boiling point? A) Ionic bonds B) Hydrogen bonds C) London forces D) Covalent bonds
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16. Which statement is true about the reaction A + B C + D + heat? A) The forward and reverse reactions are exothermic. B) The forward reaction is exothermic, and the reverse reaction is endothermic. C) The forward reaction is exothermic, and the reverse reaction can be either endothermic or exothermic. D) The forward reaction is endothermic, and the reverse reaction can be either endothermic or exothermic. 17. Which is the symbol for the heat of reaction? A) Ea B) H C) K D) M 18. Which action will shift the equilibrium of this reaction to the right? AB(g) + C(g) A(s) + BC(g) A) adding A B) removing C C) increasing the pressure D) increasing the volume of the reaction vessel 19. Which transition can occur when the temperature of a substance is increased at constant pressure? I Sublimation II Melting III Boiling A) I and II only B) II and III only C) I and III only D) I, II, and III 20. Which statement describes the characteristics of an endothermic reaction? A) Hrxn is positive, and the reaction products have less energy than the reactants. B) Hrxn is positive, and the reaction products have more energy than the reactants. C) Hrxn is negative, and the reaction products have less energy than the reactants. D) Hrxn is negative, and the reaction products have more energy than the reactants.
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21. Which statement is true about reaction rate for the reaction: A + B C + D? A) If the reaction begins with only A and B, the reaction rate will be positive, because C and D are forming. B) If the reaction begins with only C and D, the rate will be negative because the concentrations of C and D decrease as A and B form. C) The reaction rate will be positive because rate is defined as the change in the number of moles of a reactant or a product per unit time. D) The reaction rate will be zero, because there are no reactants in the mixture, so the reaction cannot take place. 22. The kinetic energy of molecules decreases when: A) the sample volume is decreased B) the substance condenses C) the substance sublimes D) the pressure is increased 23. The addition of a catalyst to a chemical reaction brings about a change in: A) the activation energy of the reaction B) the heat of reaction (Hrxn) of the reaction C) the magnitude of the equilibrium constant of the reaction D) the products formed by the reaction 24. In an aqueous solution of sodium chloride, ____ is the solute and ______ is the solvent. A) Cl; Na B) Na; Cl C) NaCl; H2O D) H2O; NaCl 25. One liter of 2 M NaOH can be prepared with water and how many g of NaOH? A) 20 g of NaOH B) 40 g of NaOH C) 60 g of NaOH D) 80 g of NaOH
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Answer Key EXAM A
1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. B A A D B A B A C B A C C D C B B C D B C B A C D
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EXAM 2 VERSION B
CH 313 N
Date: 10/26/2007
1. Which is the symbol for the heat of reaction? A) Ea B) H C) K D) M 2. What is the equilibrium constant expression for this reaction? aA(aq) + bB(aq) + cC(aq) dD(l) + eE(s) A) [A]a[B]b[C]c[D]d[E]e B) [A]a[B]b[C]c C) 1 / [A]a[B]b[C]c D) [D]d[E]e / [A]a[B]b[C]c 3. The addition of a catalyst to a chemical reaction brings about a change in: A) the activation energy of the reaction B) the heat of reaction (Hrxn) of the reaction C) the magnitude of the equilibrium constant of the reaction D) the products formed by the reaction 4. In a solution with pH = 7.0: A) [H3O+] = [OH] B) [H3O+] > [OH] C) [H3O+] < [OH] D) [H3O+] + [OH] = Kw 5. Which statement is true about the reaction A + B C + D + heat? A) The forward and reverse reactions are exothermic. B) The forward reaction is exothermic, and the reverse reaction is endothermic. C) The forward reaction is exothermic, and the reverse reaction can be either endothermic or exothermic. D) The forward reaction is endothermic, and the reverse reaction can be either endothermic or exothermic.
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6. One liter of 2 M NaOH can be prepared with water and how many g of NaOH? A) 20 g of NaOH B) 40 g of NaOH C) 60 g of NaOH D) 80 g of NaOH 7. What is a sphygmomanometer used for? A) measuring blood pressure B) measuring pressure inside the eye C) measuring masses D) examining the ear canal 8. In which state of matter are molecules extremely far apart and disordered? I Solid II Liquid III Gas A) I only B) II only C) III only D) II and III only 9. Analysis of calcium carbide showed its mass composition is 62.5% calcium and 37.5% carbon. What is its empirical formula? A) CaC2 B) Ca2C C) CaC D) Ca3C2 10. Which solution is the most basic? A) blood B) vinegar C) milk D) household ammonia 11. Which secondary force would be expected to hold together the particles of a liquid with a very low boiling point? A) Ionic bonds B) Hydrogen bonds C) London forces D) Covalent bonds
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12. The kinetic energy of molecules decreases when: A) the sample volume is decreased B) the substance condenses C) the substance sublimes D) the pressure is increased 13. The chemical formula for cocaine is C17H21NO4. What is the percent carbon in cocaine? A) 32.2 B) 67.3 C) 8.43 D) 46.7 14. Which action will shift the equilibrium of this reaction to the right? AB(g) + C(g) A(s) + BC(g) A) adding A B) removing C C) increasing the pressure D) increasing the volume of the reaction vessel 15. In which state of are matter molecules packed as closely together as possible? I Solid II Liquid III Gas A) I only B) II only C) III only D) I and II only 16. Which statement is true about reaction rate for the reaction: A + B C + D? A) If the reaction begins with only A and B, the reaction rate will be positive, because C and D are forming. B) If the reaction begins with only C and D, the rate will be negative because the concentrations of C and D decrease as A and B form. C) The reaction rate will be positive because rate is defined as the change in the number of moles of a reactant or a product per unit time. D) The reaction rate will be zero, because there are no reactants in the mixture, so the reaction cannot take place.
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17. Which transition can occur when the temperature of a substance is increased at constant pressure? I Sublimation II Melting III Boiling A) I and II only B) II and III only C) I and III only D) I, II, and III 18. Which of these compounds is not a strong acid? A) HCl B) H2SO4 C) HNO3 D) H2SO3 19. A gas occupies a volume of 525 mL at a pressure of 1.00 atm. What is the new volume of the gas when the pressure is doubled? A) 104 mL B) 263 mL C) 345 mL D) 760 mL 20. A gas under 33.30 atm pressure occupies 30.00 L at 273C. What is the volume of the gas at STP (1 atm & 0oC)? A) 259 L B) 500 L C) 1000 L D) 2000 L 21. In which state does matter undergo a large change in volume on heating? I Solid II Liquid III Gas A) I only B) II only C) III only D) II and III only
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22. In an aqueous solution of sodium chloride, ____ is the solute and ______ is the solvent. A) Cl; Na B) Na; Cl C) NaCl; H2O D) H2O; NaCl 23. Which solution is the most acidic? A) blood B) vinegar C) milk D) detergent 24. Which statement describes the characteristics of an endothermic reaction? A) Hrxn is positive, and the reaction products have less energy than the reactants. B) Hrxn is positive, and the reaction products have more energy than the reactants. C) Hrxn is negative, and the reaction products have less energy than the reactants. D) Hrxn is negative, and the reaction products have more energy than the reactants. 25. Consider the balanced equation: 3NaHCO3 + C6H8O7 3CO2 + 3H2O + Na3C6H5O7 What mass of CO2 is produced when 200 g of NaHCO3 undergoes reaction? A) 105 g B) 183 g C) 210 g D) 315 g
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Answer Key EXAM B
1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. B C A A B D A C A D C B B C A C D D B B C C B B A
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EXAM 2 VERSION C
CH 313 N
Date: 10/26/2007
1. What is a sphygmomanometer used for? A) measuring blood pressure B) measuring pressure inside the eye C) measuring masses D) examining the ear canal 2. In a solution with pH = 7.0: A) [H3O+] = [OH] B) [H3O+] > [OH] C) [H3O+] < [OH] D) [H3O+] + [OH] = Kw 3. Analysis of calcium carbide showed its mass composition is 62.5% calcium and 37.5% carbon. What is its empirical formula? A) CaC2 B) Ca2C C) CaC D) Ca3C2 4. What is the equilibrium constant expression for this reaction? aA(aq) + bB(aq) + cC(aq) dD(l) + eE(s) a b c d e A) [A] [B] [C] [D] [E] B) [A]a[B]b[C]c C) 1 / [A]a[B]b[C]c D) [D]d[E]e / [A]a[B]b[C]c 5. Which statement is true about reaction rate for the reaction: A + B C + D? A) If the reaction begins with only A and B, the reaction rate will be positive, because C and D are forming. B) If the reaction begins with only C and D, the rate will be negative because the concentrations of C and D decrease as A and B form. C) The reaction rate will be positive because rate is defined as the change in the number of moles of a reactant or a product per unit time. D) The reaction rate will be zero, because there are no reactants in the mixture, so the reaction cannot take place.
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6. Which solution is the most acidic? A) blood B) vinegar C) milk D) detergent 7. Which transition can occur when the temperature of a substance is increased at constant pressure? I Sublimation II Melting III Boiling A) I and II only B) II and III only C) I and III only D) I, II, and III 8. In an aqueous solution of sodium chloride, ____ is the solute and ______ is the solvent. A) Cl; Na B) Na; Cl C) NaCl; H2O D) H2O; NaCl 9. Which statement describes the characteristics of an endothermic reaction? A) Hrxn is positive, and the reaction products have less energy than the reactants. B) Hrxn is positive, and the reaction products have more energy than the reactants. C) Hrxn is negative, and the reaction products have less energy than the reactants. D) Hrxn is negative, and the reaction products have more energy than the reactants. 10. In which state of matter are molecules packed as closely together as possible? I Solid II Liquid III Gas A) I only B) II only C) III only D) I and II only
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11. A gas occupies a volume of 525 mL at a pressure of 1.00 atm. What is the new volume of the gas when the pressure is doubled? A) 104 mL B) 263 mL C) 345 mL D) 760 mL 12. A gas under 33.30 atm pressure occupies 30.00 L at 273C. What is the volume of the gas at STP (1 atm & 0oC)? A) 259 L B) 500 L C) 1000 L D) 2000 L 13. In which state does matter undergo a large change in volume on heating? I Solid II Liquid III Gas A) I only B) II only C) III only D) II and III only 14. The kinetic energy of molecules decreases when: A) the sample volume is decreased B) the substance condenses C) the substance sublimes D) the pressure is increased 15. Which statement is true about the reaction A + B C + D + heat? A) The forward and reverse reactions are exothermic. B) The forward reaction is exothermic, and the reverse reaction is endothermic. C) The forward reaction is exothermic, and the reverse reaction can be either endothermic or exothermic. D) The forward reaction is endothermic, and the reverse reaction can be either endothermic or exothermic.
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16. Which solution is the most basic? A) blood B) vinegar C) milk D) household ammonia 17. Which is the symbol for the heat of reaction? A) Ea B) H C) K D) M 18. Which of these compounds is not a strong acid? A) HCl B) H2SO4 C) HNO3 D) H2SO3 19. Which secondary force would be expected to hold together the particles of a liquid with a very low boiling point? A) Ionic bonds B) Hydrogen bonds C) London forces D) Covalent bonds 20. The chemical formula for cocaine is C17H21NO4. What is the percent carbon in cocaine? A) 32.2 B) 67.3 C) 8.43 D) 46.7 21. The addition of a catalyst to a chemical reaction brings about a change in: A) the activation energy of the reaction B) the heat of reaction (Hrxn) of the reaction C) the magnitude of the equilibrium constant of the reaction D) the products formed by the reaction
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22. One liter of 2 M NaOH can be prepared with water and how many g of NaOH? A) 20 g of NaOH B) 40 g of NaOH C) 60 g of NaOH D) 80 g of NaOH 23. Which action will shift the equilibrium of this reaction to the right? AB(g) + C(g) A(s) + BC(g) A) adding A B) removing C C) increasing the pressure D) increasing the volume of the reaction vessel 24. In which state of matter are molecules extremely far apart and disordered? I Solid II Liquid III Gas A) I only B) II only C) III only D) II and III only 25. Consider the balanced equation: 3NaHCO3 + C6H8O7 3CO2 + 3H2O + Na3C6H5O7 What mass of CO2 is produced when 200 g of NaHCO3 undergoes reaction? A) 105 g B) 183 g C) 210 g D) 315 g
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Answer Key EXAM C
1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. A A A C C B D C B A B B C B B D B D C B A D C C A
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