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Which of the following correctly describes the influence of intermolecular forces on the properties of matter? 1. Intermolecular forces determine the solubility of gases, liquids, and solids in various solvents. 2. Intermolecular forces are directly related to the energy required to accomplish phase changes. 3. Intermolecular forces do not influence the structure of molecules like DNA and proteins. a) 1 only b) 2 only c) 3 only d) 1 and 2 e) 1,2 and 3 Question 2 Place the following cations in order from the most negative to the least negative hydration enthalpy: H*, Rb*, and Li". a) Rb* < Lit < H*

Which of the following correctly describes the influence of intermolecular forces on the properties of matter? 1. Intermolecular forces determine the solubility of gases, liquids, and solids in various solvents. 2. Intermolecular forces are directly related to the energy required to accomplish phase changes. 3. Intermolecular forces do not influence the structure of molecules like DNA and proteins. a) 1 only b) 2 only c) 3 only d) 1 and 2 e) 1,2 and 3 Question 2 Place the following cations in order from the most negative to the least negative hydration enthalpy: H*, Rb*, and Li". a) Rb* < Lit < H*

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Chemistry
9th Edition
ISBN:9781133611097
Author:Steven S. Zumdahl
Publisher:Steven S. Zumdahl
Chapter10: Liquids And Solids
Section: Chapter Questions
Problem 1RQ: What are intermolecular forces? How do they differ from intramolecular forces? What are...
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Question 1 Which of the following correctly describes the influence of intermolecular forces on the properties of matter? 1. Intermolecular forces determine the solubility of gases, liquids, and solids in various solvents. 2. Intermolecular forces are directly related to the energy required to accomplish phase changes. 3. Intermolecular forces do not influence the structure of molecules like DNA and proteins. a) 1 only b) 2 only c) 3 only d) 1 and 2 e) 1, 2 and 3 Question 2 Place the following cations in order from the most negative to the least negative hydration enthalpy: H*, Rb*, and Li*. a) Rb* < Lit < H* b) Rb* < H* < Li* c) H* < Li* < Rb* d) H* < Rb* < Li* e) Li* < H* < Rb* Question 3 The normal boiling points of some group 7A hydrides are tabulated below. gas HF HCI b.p. (°C) 19.7 -84.8 HBr -66.4 Which intermolecular force or bond is responsible for the high boiling point of HF relative to HCI and HBr? a) hydrogen bonding b) dipole/induced dipole force c) induced dipole/induced dipole force d) covalent bonding e) dipole-dipole force
Transcribed Image Text:Question 1 Which of the following correctly describes the influence of intermolecular forces on the properties of matter? 1. Intermolecular forces determine the solubility of gases, liquids, and solids in various solvents. 2. Intermolecular forces are directly related to the energy required to accomplish phase changes. 3. Intermolecular forces do not influence the structure of molecules like DNA and proteins. a) 1 only b) 2 only c) 3 only d) 1 and 2 e) 1, 2 and 3 Question 2 Place the following cations in order from the most negative to the least negative hydration enthalpy: H*, Rb*, and Li*. a) Rb* < Lit < H* b) Rb* < H* < Li* c) H* < Li* < Rb* d) H* < Rb* < Li* e) Li* < H* < Rb* Question 3 The normal boiling points of some group 7A hydrides are tabulated below. gas HF HCI b.p. (°C) 19.7 -84.8 HBr -66.4 Which intermolecular force or bond is responsible for the high boiling point of HF relative to HCI and HBr? a) hydrogen bonding b) dipole/induced dipole force c) induced dipole/induced dipole force d) covalent bonding e) dipole-dipole force
Question 4 Which of the following statements is/are CORRECT? If an ionic compound with the formula MX forms a face-centered cubic unit cell with the anions (Xn) at the lattice points, the cations (Mn*) may occupy 1. one fourth of the tetrahedral holes in each unit cell. 2. all of the octahedral holes in each unit cell. 3. the center of each face in each unit cell. a) 1 only b) 2 only 2 c) 3 only d) 1 and 2 e) 1, 2, and 3 Question 5 Strontium oxide has a face centered cubic unit cell of oxide ions with the strontium in octahedral holes. If the radius of Sr2* is 127 pm and the density of Sro is 4.7 g/cm', what is the radius of the oxide ion? (100 cm = 1 x 1012 pm) a) 176 pm b) 132 pm c) 127 pm d) 137 pm e) 273 pm Question 6 The lattice energy of NaBr is -752 kJ/mol. This energy corresponds to which reaction below? a) Na(s) + 1/2 Br2(g) NaBr(s) b) Na(g) + Br(g) - NaBr(s) c) Na(g) + Br(g) NaBr(s) d) Na*(g) + Br(g) NaBr(s) e) Na*(aq) + Br (aq) NaBr(s)
Transcribed Image Text:Question 4 Which of the following statements is/are CORRECT? If an ionic compound with the formula MX forms a face-centered cubic unit cell with the anions (Xn) at the lattice points, the cations (Mn*) may occupy 1. one fourth of the tetrahedral holes in each unit cell. 2. all of the octahedral holes in each unit cell. 3. the center of each face in each unit cell. a) 1 only b) 2 only 2 c) 3 only d) 1 and 2 e) 1, 2, and 3 Question 5 Strontium oxide has a face centered cubic unit cell of oxide ions with the strontium in octahedral holes. If the radius of Sr2* is 127 pm and the density of Sro is 4.7 g/cm', what is the radius of the oxide ion? (100 cm = 1 x 1012 pm) a) 176 pm b) 132 pm c) 127 pm d) 137 pm e) 273 pm Question 6 The lattice energy of NaBr is -752 kJ/mol. This energy corresponds to which reaction below? a) Na(s) + 1/2 Br2(g) NaBr(s) b) Na(g) + Br(g) - NaBr(s) c) Na(g) + Br(g) NaBr(s) d) Na*(g) + Br(g) NaBr(s) e) Na*(aq) + Br (aq) NaBr(s)
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