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Chem-Test-3 - ViewAttempt1of1 Title MT3 Started...

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View Attempt 1 of 1 Title: MT3 Started: April 22, 2008 4:20 PM Submitted: April 22, 2008 5:26 PM Time spent: 01:06:20 Total score: 17/20 = 85% Total score adjusted by 0.0 Maximum possible score: 20 1. If the equilibrium conditions found in the reaction: A (aq) + B (aq) C (aq) + D(aq) are [A] = 2.61 M, [B] = 1.92 M, [C] = 0.907 M, and [D] = 1.01 M, calculate the value of K c . Student Response Correct Answer a. 0.183 b. 2.10 c. 1.22 d. 0.661 e. 0.423 Score: 1/1 2. K p for the reaction H 2 (g) + I 2 (g) ⇔ 2 HI(g) is 54.3 at 698°C. What is the value of K c at this temperature? (R = 0.0821 L atm/mol K) Student Response Correct Answer a. 85.6 b. 1.8 × 10 −2 c. 2.3 × 10 −4 d. 4.33 × 10 3 e. 54.3 Score: 1/1 3. According to the following equilibrium,
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2 HI (g) ⇔ H 2 (g) + I 2 (g) ΔH = −26.48 k J /mol the concentration of HI in equilibrium with H 2 and I 2 will decrease Student Response Correct Answer a. by addition of a catalyst to the reaction. b. by increasing the pressure of the system. c. by adding some hydrogen gas. d. by heating the system. e. by removing some iodine gas. Score: 1/1 4. If 0.01 mol CO (g) and 0.10 mol Cl 2 (g) are added to a 1.0 L flask, how many moles of CO (g) will there be at equilibrium? CO (g) + Cl 2 (g) COCl 2 K c = 1.2 × 10 3 Student Response Correct Answer a. 0.01 b. 0.00 c. -0.09 d. 9 × 10 −5 e. 3 × 10 −3 Score: 0/1 5. Thermal decomposition of rail car load of limestone to lime and carbon dioxide requires 4.41 x 10 6 kJ of heat. Convert this energy to calories.
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