Chemistry Exam II (Spring 2008)

Chemistry Exam II (Spring 2008) - Chemistry Exam II View...

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Chemistry Exam II View Attempt 1 of 1 Title: Exam 2 Started: March 26, 2008 1:33 PM Submitted: March 26, 2008 2:25 PM Time spent: 00:52:01 Total score: 16/20 = 80% Total score adjusted by 0.0 Maximum possible score: 20 1. P-32 undergoes beta decay. What is the product nucleus? Enter your answer using the same format, i.e, symbol-mass number Student Response Valu e Correct Answer 1. S-32 100% Equals S-32 (100%) Score: 1/1 2.
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An atom of 112 In has a mass of 111.905536 amu. Calculate the binding energy in MeV per atom. Use the masses: mass of 1 H atom = 1.007825 amu mass of a neutron = 1.008665 amu 1 amu = 931.5 MeV Give your answer to 3 significant figures and DO NOT use E notation. No charity points will be awarded. ...... Student Response Valu e Correct Answer 1. 954 100% Equals 953 (100%) Equals 954 (100%) Score: 1/1 3. N-12 is radioactive. Which mode of decay would be expected for this nucleus? Student Response Valu e Correct Answer 1. Alpha decay 0% 2. Beta decay 0% 3 . Positron decay/electron capture 100% 4. Neutron decay 0% 5. Proton decay 0% Score: 1/1 4.
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122 Sb is expected to be stable. Student Response Valu e Correct Answer 1 . True 100% 2. False 0% Score: 1/1 5. Consider the gas-phase reaction, Cl 2 (g) + Br 2 (g) <=> 2 BrCl(g), for which K p = 32 at 500 K. If the mixture is analyzed and found to contain 0.47 bar of Cl 2 , 0.47 bar of Br 2 and 2.6 bar of BrCl, describe the situation: Student Response Valu e Correct Answer 1. Q < K and more reactants will be made to reach equilibrium. 0% 2 . Q < K and more products will be made to reach equilibrium. 100% 3. Q > K and more reactants will be made to reach equilibrium. 0% 4. Q > K and more products will be made to reach equilibrium. 0% 5. Within 1 decimal place, Q = K and the reaction is at equilibrium 0% Score: 1/1 6.
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At a certain temperature, K p for the reaction, Cl 2 (g) + I 2 (g) <=> 2 ICl(g) is 0.000617. Calculate the value of K p for the reaction, 2 ICl(g) <=> Cl 2 (g) + I 2 (g). Student Response Valu e Correct Answer Answer 1620.75 100% 1,621 Score: 1/1 7. Calculate K p for the following reaction: H 2 (g) + CO 2 (g) <=> H 2 O(g) + CO(g); K c = 17.10 at 250 o C Give your answer to 3 significant figures Student Response Valu e Correct Answer Answer 17.10 100% 17.1 Score: 1/1 8.
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2 NO 2 (g) <=> N 2 O 4 (g). N 2 (g) + 2 O 2 (g) <=> 2 NO 2 (g) K = 973.67 N 2 (g) + 2 O 2 (g) <=> N 2 O 4 (g) K = 18.40 Give your answer to 3 or 4 decimal places Student Response Valu e Correct Answer Answer 18.40 0% 0.0189 Score: 0/1 9. At a given temperature, 4.03 atm of Cl 2 and 2.16 atm of Br 2 are mixed and allowed to come to equilibrium. The equilibrium pressure of BrCl is found to be 1.487 atm. Calculate K p for the reaction at this temperature. Cl
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Chemistry Exam II (Spring 2008) - Chemistry Exam II View...

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