Fall 2009 Exam 2 Practice B _Zumdahl Chapters 5,6,7,16p,17_ no answer key

Fall 2009 Exam 2 Practice B _Zumdahl Chapters 5,6,7,16p,17_ no answer key

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Practice Exam 2 B (Zumdahl Chapters 5, 6, 7, 16p, 17) Page 1 1. Calculate the density of N 2 gas at STP. A) 0.312 g/L B) 0.625 g/L C) 0.800 g/L D) 1.25 g/L E) 1.60 g/L 2. Magnesium metal reacts with hydrochloric acid to form aqueous magnesium chloride and hydrogen gas. An excess of magnesium is reacted with 20.0 mL of 3.00 M hydrochloric acid and all of the hydrogen is collected in a balloon at 25°C and 1.00 atm. What is the expected volume of the balloon? A) 0.672 L B) 0.734 L C) 1.34 L D) 1.47 L E) 22.4 L 3. A 0.234 g sample of a gas in a 275 mL container at 23.5°C exerts a pressure of 0.292 atm What is the molar mass of the gas? A) 5.62 g/mol B) 70.9 g/mol C) 0.0141 g/mol D) 32.0 g/mol E) none of these 4. The density of diatomic gas is 1.696 g/L at STP. Identify the gas. A) H 2 B) N 2 C) O 2 D) F 2 E) Cl 2
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Practice Exam 2 B (Zumdahl Chapters 5, 6, 7, 16p, 17) Page 2 5. If, at a given temperature, the equilibrium constant for the reaction H 2 (g) + Cl 2 (g) 2HCl(g) is K p , then the equilibrium constant for the reaction HCl(g) (1/2)H 2 (g) + (1/2)Cl 2 (g) can be represented as: A) 2 1 p k B) K p 2 C) 1 p K D) p K 6. Consider the reaction: 2SO 2 (g) + O 2 (g) 2SO 3 (g) at constant temperature. Initially a container is filled with pure SO 3 (g) at a pressure of 2 atm, after which equilibrium is allowed to be reached. If y is the partial pressure of O 2 at equilibrium, the value of K p is: A)
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Fall 2009 Exam 2 Practice B _Zumdahl Chapters 5,6,7,16p,17_ no answer key

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