1 YBa 2 Cu 4 O 7 2 Y 3 Ba 3 Cu 2 O 2 3 YBa 3 Cu 2 O 7 4 YBa 7 Cu 4 O 2 5 Y 8 Ba

# 1 yba 2 cu 4 o 7 2 y 3 ba 3 cu 2 o 2 3 yba 3 cu 2 o 7

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1. YBa 2 Cu 4 O 7 2. Y 3 Ba 3 Cu 2 O 2 3. YBa 3 Cu 2 O 7 4. YBa 7 Cu 4 O 2 5. Y 8 Ba 8 Cu 3 O 12 6. Y 3 Ba 2 Cu 3 O 2 7. Y 2 Ba 2 CuO 3 8. YBa 7 Cu 2 O 3 9. Y 2 Ba 2 Cu 3 O 3 10. YBa 2 Cu 3 O 7 013 10.0 points Arrange the molecules H 2 O , NH 3 , Ar , NaCl in order of expected increasing boiling points. 1. Ar, NH 3 , H 2 O, NaCl 2. NaCl, H 2 O, NH 3 , Ar 3. None of these 4. NH 3 , Ar, H 2 O, NaCl 014 10.0 points Consider two empty containers A and B whose volumes are 10 mL and 20 mL, respec- tively. You now put 1 mL of liquid H 2 O into each container and adjust the temperature of each container to 20 C. The gas pressure in container B is found to be 17 torr. The gas pressure in container A is 1. 8.5 torr. 2. greater than 34 torr. 3. 17 torr. 4. between 17 and 34 torr.
kamalska (mk23835) – HW01 – Quigley – (104001) 4 5. 34 torr. 015 10.0 points Consider the cesium chloride unit cell be- low. Cs Cl What is its empirical formula? 1. CsCl 2. Cs 2 Cl 3 3. Cs 3 Cl 2 4. CsCl 2 5. CsCl 3 6. CsCl 8 7. Cs 3 Cl 8. Cs 2 Cl 016 10.0 points A certain liquid has a meniscus that curves downward in glass. This means that the cohe- sive forces in the liquid are less than the forces between the liquid and the glass. 1. False 2. True 017 10.0 points How many atoms are there in a face-centered cubic unit cell? 1. 10 2. 6 3. 12 4. 8 5. 4 018 10.0 points The phase diagram for a pure substance is given below. Solid Liquid Vapor 50 100 150 200 250 300 100 200 300 400 Temperature, K Pressure, atm What is the lowest temperature at which liquid can exist? 1. 0 K 2. 150 K 3. 200 K 4. 400 K 5. 250 K 019 10.0 points What are all of the intermolecular forces that are responsible for the existence of the molec- ular solid oxalic acid (H 2 C 2 O 4 )? 1. dipole-dipole and ion-ion 2. hydrogen bonding and dipole-dipole 3. London forces
kamalska (mk23835) – HW01 – Quigley – (104001) 5 4. dipole-dipole and London forces 5. dipole-dipole, London forces, and hydro- gen bonding 020 10.0 points Estimate the enthalpy of vaporization of CCl 4 given that at 25 C and 58 C its vapor pressure is 107 and 405 torr, respectively. Assume that the enthalpy of vaporization is independent of the temperature. 1. 486 J · mol 1 2. 33.1 kJ · mol 1 3. 142 kJ · mol 1 4. 3.98 kJ · mol 1 5. 48.6 kJ · mol 1 021 10.0 points A substance has a melting point of 1200 K. It conducts electricity while melting but not in the solid. This substance would be classified as 1. a hydrogen bonded solid. 2. a metallic solid. 3. a covalent network solid. 4. an ionic solid. 5. a molecular solid. 022 10.0 points In general, which kind of crystalline solid is easiest to melt?

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• Fall '08
• QUIGLEY
• Crystal, Intermolecular force, O H C H H C H O C H H C H H C H H C H H C H H C H H C H H C H H C H H C H H C H H C H H C H H C H H C H H C H H O C H H O

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