Chem Exam 2 - EXAM 2 VERSION A CH 313 N Date: 10/26/2007 1....

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EXAM 2 VERSION A CH 313 N Date: 10/26/2007 1. The chemical formula for cocaine is C 17 H 21 NO 4 . 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) CaC 2 B) Ca 2 C C) CaC D) Ca 3 C 2 3. Consider the balanced equation: 3NaHCO 3 + C 6 H 8 O 7 3CO 2 + 3H 2 O + Na 3 C 6 H 5 O 7 What mass of CO 2 is produced when 200 g of NaHCO 3 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) H 2 SO 4 C) HNO 3 D) H 2 SO 3 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 Page 1
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6. In a solution with pH = 7.0: A) [H 3 O + ] = [OH ] B) [H 3 O + ] > [OH ] C) [H 3 O + ] < [OH ] D) [H 3 O + ] + [OH ] = K w 7. A gas under 33.30 atm pressure occupies 30.00 L at 273ºC. What is the volume of the o C)? 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 Page 2
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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? 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 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 Page 3 a A( aq ) + b B( aq ) + c C( aq ) d D( l ) + e E( s )
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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?
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This test prep was uploaded on 04/16/2008 for the course CH 313N taught by Professor Johncolapret during the Fall '07 term at University of Texas at Austin.

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Chem Exam 2 - EXAM 2 VERSION A CH 313 N Date: 10/26/2007 1....

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