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A chemistry exam from fall, 2004 for chem 001. It includes multiple choice questions, short answer questions, and problems related to various topics such as lewis structures, formal charges, bond energies, and gas properties. The document also provides some useful equations and constants.
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Name___________________________________ CHEM 001 Fall, 2004 Hour Exam III YOU MUST SHOW ALL OF YOUR WORK AND/OR LOGIC ON THIS EXAM Please read and sign the following statement: "I have neither given nor received help on this exam." Signature_______________________________ I. Multiple choice ____________/ II. Short answer ____________/ III. Problems ____________/ TOTAL_____________________ Possibly useful equations and constants: PV=nRT M 3 RT u 1 2 2 1 M
r r (V nb) nRT V n a P 2 ^ R = 8.314 J/K-mol = 0.0820 L-atm/K-mol Vapor pressure of water at 20ºC = 17.5 mm Hg 760 mm Hg = 1 atm
I. Multiple choice (2 points each) Circle the letter for the correct answer.
c. Xe F 4 .. .. electron domain: octahedral : F : : F : molecular: square planar Xe : .. .. : F F :
....
b) If the valve is opened so that the gases can diffuse freely between the containers, what will be the final pressures of each gas (assume T does not change)? c) What is the total pressure in the system after the two samples have mixed? d) What is the mole fraction of each gas after the two samples have mixed?