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Unformatted text preview: jrr944 Homework 4 Lyon (53565) 1 This printout should have 18 questions. Multiplechoice questions may continue on the next column or page find all choices before answering. This HW asignment is due Wednesday, Feb. 13, by 4:00PM. 001 10.0 points When the chemical reaction A + B C + D is at equilibrium, 1. the reverse reaction has stopped. 2. neither the forward nor the reverse reac tions have stopped. 3. all four concentrations are equal. 4. the forward reaction has stopped. 5. the sum of the concentrations of A and B equals the sum of the concentrations of C and D. 6. both the forward and reverse reactions have stopped. 002 10.0 points In which of the following cases will the LEAST time be required to arrive at equilibrium? K below refers to the equilibrium constant. 1. K is a very large number. 2. Cannot tell without knowing the value of K . 3. Cannot tell since the time to arrive at equilibrium does not depend on K . 4. K is a very small number. 5. K is about 1. 003 10.0 points Consider the reaction 2 SO 2 (g) + O 2 (g) 2 SO 3 (g) . At equilibrium at a certain temperature, the concentrations of SO 3 (g), SO 2 (g), and O 2 (g) are 0.12 M, 0.86 M, and 0.33 M, respectively. Calculate the value of K c for this reaction. 1. 0.014 2. 1.31 3. 0.42 4. 0.059 5. 0.87 004 10.0 points Write the equilibrium expression for the reac tion N 2 (g) + 2 H 2 (g) N 2 H 4 (g) 1. K = P N 2 H 4 P N 2 P 2 H 2 2. K = P N 2 P 2 H 2 P 2 N 2 H 4 3. K = P N 2 H 4 P 2 N 2 P H 2 4. K = P N 2 P N 2 H 4 P 2 H 2 5. K = P N 2 H 4 P N 2 2 P H 2 005 10.0 points What would be the expression for...
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 Spring '07
 Holcombe

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