Question 1

Sodium iodide, NaI, melts at 651 ∘\circ∘ C. In its liquid state NaI conducts electricity. What kind of crystal is this

Accepted Answer

A)   Ionic Crystal
B)   Covalent Crystal
C)   Metallic Crystal
D)   Molecular Crystal
E)   Amorphous (Not a regular crystal)  F) C) and D)
G) B) and D)

Question 2

Octane is a liquid component of gasoline. Given the following vapor pressures of octane at various temperatures, estimate the boiling point of octane in Leadville, Colorado, where the atmospheric pressure is 496 mmHg.400 mmHg @ 104 ∘\circ∘ C, 500 mmHg @ 111 ∘\circ∘ C, 600 mmHg @ 117 ∘\circ∘ C, 700 mmHg @ 122 ∘\circ∘ C, 760 mmHg @ 125 ∘\circ∘ C

Accepted Answer

A)   125 ∘\circ∘ C
B)   120 ∘\circ∘ C
C)   115 ∘\circ∘ C
D)   110 ∘\circ∘ C
E)   105 ∘\circ∘ C F) A) and D)
G) A) and C)

Question 3

Which of the following would be expected to have the lowest vapor pressure at room temperature

Accepted Answer

A)   ethanol, bp = 78 ∘\circ∘ C
B)   methanol, bp = 65 ∘\circ∘ C
C)   water, bp = 100 ∘\circ∘ C
D)   acetone, bp = 56 ∘\circ∘ C E) C) and D)
F) A) and B)

Question 4

The mineral manganosite, manganese(II)  oxide, crystallizes in the rock salt structure (the face-centered structure adopted by NaCl)  with a density of 5.365 g/cm3. Find the unit cell edge length of manganosite.

Accepted Answer

A)   280.0 pm
B)   352.8 pm
C)   368.2 pm
D)   417.9 pm
E)   444.5 pmF) A) and D)
G) A) and B)

Question 5

Identify the dominant (strongest)  type of intermolecular force present in Cl2(l) .

Accepted Answer

A)   Dispersion
B)   Dipole-dipole
C)   Ion-dipole
D)   Hydrogen bonding
E)   IonicF) D) and E)
G) C) and D)

Question 6

The meniscus for water is curved upward at the edges (i.e., it is "concave up") because adhesion of water to glass is stronger than cohesion within water.

Accepted Answer

A) True 
 B)False

Question 7

C5H12 is more viscous than C5H10(OH)2.

Accepted Answer

A) True 
 B)False

Question 8

Which of the following characteristics indicates the presence of weak intermolecular forces in a liquid

Accepted Answer

A)   a low heat of vaporization
B)   a high critical temperature
C)   a low vapor pressure
D)   a high boiling point
E)   None of the above.F) A) and B)
G) B) and E)

Question 9

Identify the dominant (strongest)  type of intermolecular force present in NH3(l) .

Accepted Answer

A)   Dispersion
B)   Dipole-dipole
C)   Ion-dipole
D)   Hydrogen bonding
E)   IonicF) C) and E)
G) C) and D)

Question 10

Ethanol has a higher boiling point than dimethyl ether. (Ethanol and dimethyl ether have the same molecular formula, C2H6O. Their structural formulas are, respectively, CH3CH2OH and CH3OCH3.)

Accepted Answer

A) True 
 B)False

Question 11

The most space efficient arrangement of spheres is found in which type(s)  of atom arrangement
I. hexagonal close-packed
II. cubic close-packed
III. simple cubic
IV. body-centered cubic

Accepted Answer

A)   I only
B)   II only
C)   I and II
D)   IV only
E)   I, II, and IVF) C) and E)
G) None of the above

Question 12

Glass is classified as a/an

Accepted Answer

A)   metallic crystal.
B)   covalent solid.
C)   molecular crystal.
D)   amorphous solid.
E)   ionic crystal.F) All of the above
G) A) and E)

Question 13

Indicate all the types of intermolecular forces of attraction in CF4(g) .

Accepted Answer

A)   Dispersion and Dipole-dipole
B)   Dipole-dipole and Ionic
C)   Ion-dipole and Hydrogen bonding
D)   Hydrogen bonding and Dispersion
E)   DispersionF) A) and B)
G) A) and C)

Question 14

The molar heat of vaporization ($\Delta$Hvap) of H2Se is greater than H2O.

Accepted Answer

A) True 
 B)False

Question 15

Indicate all the types of intermolecular forces of attraction in HF(l) .

Accepted Answer

A)   Dispersion and Dipole-dipole
B)   Dipole-dipole and Ionic
C)   Ion-dipole and Hydrogen bonding
D)   Hydrogen bonding and Dispersion
E)   DispersionF) B) and E)
G) B) and C)

Question 16

Indicate all the types of intermolecular forces of attraction in F2(l) .

Accepted Answer

A)   Dispersion and Dipole-dipole
B)   Dipole-dipole and Ionic
C)   Ion-dipole
D)   Hydrogen bonding
E)   DispersionF) A) and C)
G) None of the above

Question 17

Copper crystallizes in a face-centered cubic unit cell. The density of copper is 8.94 g/cm3. Calculate the length of the edge of the unit cell in pm.

Accepted Answer

A)   461 pm
B)   361 pm
C)   261 pm
D)   161 pm
E)   None of the aboveF) B) and C)
G) C) and E)

Question 18

Which one of the following substances is expected to have the highest melting point

Accepted Answer

A)   CH4
B)   CCl4
C)   CO
D)   CO2
E)   C(diamond) F) A) and C)
G) C) and D)

Question 19

Arrange the following substances in order of increasing boiling point: CH3CH2OH, HOCH2CH2OH, CH3CH2Cl, and ClCH2CH2OH

Accepted Answer

A)   CH3CH2OH 2CH2OH 3CH2Cl 2CH2OH
B)   CH3CH2Cl 3CH2OH 2CH2OH 2CH2OH
C)   CH3CH2OH 3CH2Cl 2CH2OH 2CH2OH
D)   CH3CH2Cl 2CH2OH 3CH2OH 2CH2OH
E)   CH3CH2OH 2CH2OH 3CH2Cl 2CH2OHF) All of the above
G) B) and D)

Question 20

Arrange the following in order of increasing boiling point: RbCl, CH3Cl, CH3OH, CH4.

Accepted Answer

A)   CH3OH 3Cl 4
B)   CH3OH 4 3Cl 
C)   RbCl 3Cl 3OH 4
D)   CH4 3OH 3Cl 
E)   CH4 3Cl 3OH < RbClF) A) and C)
G) B) and D)

Exam 11: Intermolecular Forces and Liquids and Solids

The meniscus for water is curved upward at the edges (i.e., it is "concave up") because adhesion of water to glass is stronger than cohesion within water.

Correct Answer
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Indicate all the types of intermolecular forces of attraction in F₂(l) .

Correct Answer
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Which of the following would be expected to have the lowest vapor pressure at room temperature

Correct Answer
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Arrange the following in order of increasing boiling point: RbCl, CH₃Cl, CH₃OH, CH₄.

Correct Answer
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C₅H₁₂ is more viscous than C₅H₁₀(OH)₂.

Correct Answer
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Copper crystallizes in a face-centered cubic unit cell. The density of copper is 8.94 g/cm³. Calculate the length of the edge of the unit cell in pm.

Correct Answer
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The molar heat of vaporization ( $\Delta$ H_vap) of H₂Se is greater than H₂O.

Correct Answer
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Glass is classified as a/an

Correct Answer
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Which of the following characteristics indicates the presence of weak intermolecular forces in a liquid

Correct Answer
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Arrange the following substances in order of increasing boiling point: CH₃CH₂OH, HOCH₂CH₂OH, CH₃CH₂Cl, and ClCH₂CH₂OH

Correct Answer
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Identify the dominant (strongest) type of intermolecular force present in Cl₂(l) .

Correct Answer
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Correct Answer
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Sodium iodide, NaI, melts at 651^$\circ$C. In its liquid state NaI conducts electricity. What kind of crystal is this

Correct Answer
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The mineral manganosite, manganese(II) oxide, crystallizes in the rock salt structure (the face-centered structure adopted by NaCl) with a density of 5.365 g/cm³. Find the unit cell edge length of manganosite.

Correct Answer
verified

Ethanol has a higher boiling point than dimethyl ether. (Ethanol and dimethyl ether have the same molecular formula, C₂H₆O. Their structural formulas are, respectively, CH₃CH₂OH and CH₃OCH₃.)

Correct Answer
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Identify the dominant (strongest) type of intermolecular force present in NH₃(l) .

Correct Answer
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Indicate all the types of intermolecular forces of attraction in HF(l) .

Correct Answer
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Which one of the following substances is expected to have the highest melting point

Correct Answer
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Indicate all the types of intermolecular forces of attraction in CF₄(g) .

Correct Answer
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The most space efficient arrangement of spheres is found in which type(s) of atom arrangement I. hexagonal close-packed II. cubic close-packed III. simple cubic IV. body-centered cubic

Correct Answer
verified

Exam 11: Intermolecular Forces and Liquids and Solids

The meniscus for water is curved upward at the edges (i.e., it is "concave up") because adhesion of water to glass is stronger than cohesion within water.

Correct AnswerverifiedShow Answer

Indicate all the types of intermolecular forces of attraction in F2(l) .

Correct AnswerverifiedShow Answer

Which of the following would be expected to have the lowest vapor pressure at room temperature

Correct AnswerverifiedShow Answer

Arrange the following in order of increasing boiling point: RbCl, CH3Cl, CH3OH, CH4.

Correct AnswerverifiedShow Answer

C5H12 is more viscous than C5H10(OH)2.

Correct AnswerverifiedShow Answer

Copper crystallizes in a face-centered cubic unit cell. The density of copper is 8.94 g/cm3. Calculate the length of the edge of the unit cell in pm.

Correct AnswerverifiedShow Answer

The molar heat of vaporization ( Δ\DeltaΔ Hvap) of H2Se is greater than H2O.

Correct AnswerverifiedShow Answer

Glass is classified as a/an

Correct AnswerverifiedShow Answer

Which of the following characteristics indicates the presence of weak intermolecular forces in a liquid

Correct AnswerverifiedShow Answer

Arrange the following substances in order of increasing boiling point: CH3CH2OH, HOCH2CH2OH, CH3CH2Cl, and ClCH2CH2OH

Correct AnswerverifiedShow Answer

Identify the dominant (strongest) type of intermolecular force present in Cl2(l) .

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Sodium iodide, NaI, melts at 651 ∘\circ∘ C. In its liquid state NaI conducts electricity. What kind of crystal is this

Correct AnswerverifiedShow Answer

The mineral manganosite, manganese(II) oxide, crystallizes in the rock salt structure (the face-centered structure adopted by NaCl) with a density of 5.365 g/cm3. Find the unit cell edge length of manganosite.

Correct AnswerverifiedShow Answer

Ethanol has a higher boiling point than dimethyl ether. (Ethanol and dimethyl ether have the same molecular formula, C2H6O. Their structural formulas are, respectively, CH3CH2OH and CH3OCH3.)

Correct AnswerverifiedShow Answer

Identify the dominant (strongest) type of intermolecular force present in NH3(l) .

Correct AnswerverifiedShow Answer

Indicate all the types of intermolecular forces of attraction in HF(l) .

Correct AnswerverifiedShow Answer

Which one of the following substances is expected to have the highest melting point

Correct AnswerverifiedShow Answer

Indicate all the types of intermolecular forces of attraction in CF4(g) .

Correct AnswerverifiedShow Answer

The most space efficient arrangement of spheres is found in which type(s) of atom arrangement I. hexagonal close-packed II. cubic close-packed III. simple cubic IV. body-centered cubic

Correct AnswerverifiedShow Answer

Correct Answer
verified

Indicate all the types of intermolecular forces of attraction in F₂(l) .

Correct Answer
verified

Correct Answer
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Arrange the following in order of increasing boiling point: RbCl, CH₃Cl, CH₃OH, CH₄.

Correct Answer
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C₅H₁₂ is more viscous than C₅H₁₀(OH)₂.

Correct Answer
verified

Copper crystallizes in a face-centered cubic unit cell. The density of copper is 8.94 g/cm³. Calculate the length of the edge of the unit cell in pm.

Correct Answer
verified

The molar heat of vaporization ( $\Delta$ H_vap) of H₂Se is greater than H₂O.

Correct Answer
verified

Correct Answer
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Correct Answer
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Arrange the following substances in order of increasing boiling point: CH₃CH₂OH, HOCH₂CH₂OH, CH₃CH₂Cl, and ClCH₂CH₂OH

Correct Answer
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Identify the dominant (strongest) type of intermolecular force present in Cl₂(l) .

Correct Answer
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Correct Answer
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Sodium iodide, NaI, melts at 651^$\circ$C. In its liquid state NaI conducts electricity. What kind of crystal is this

Correct Answer
verified

The mineral manganosite, manganese(II) oxide, crystallizes in the rock salt structure (the face-centered structure adopted by NaCl) with a density of 5.365 g/cm³. Find the unit cell edge length of manganosite.

Correct Answer
verified

Ethanol has a higher boiling point than dimethyl ether. (Ethanol and dimethyl ether have the same molecular formula, C₂H₆O. Their structural formulas are, respectively, CH₃CH₂OH and CH₃OCH₃.)

Correct Answer
verified

Identify the dominant (strongest) type of intermolecular force present in NH₃(l) .

Correct Answer
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Correct Answer
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Correct Answer
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Indicate all the types of intermolecular forces of attraction in CF₄(g) .

Correct Answer
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Correct Answer
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