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In which of the following compounds will the molecules not form hydrogen bonds with each other?


A) In which of the following compounds will the molecules not form hydrogen bonds with each other? A) B) C) D) E)
B) In which of the following compounds will the molecules not form hydrogen bonds with each other? A) B) C) D) E)
C) In which of the following compounds will the molecules not form hydrogen bonds with each other? A) B) C) D) E)
D) In which of the following compounds will the molecules not form hydrogen bonds with each other? A) B) C) D) E)
E) In which of the following compounds will the molecules not form hydrogen bonds with each other? A) B) C) D) E)

F) A) and B)
G) A) and C)

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Use molecular orbital band diagrams to explain why metals are good conductors but semiconductors are not.

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In metals, the conduction and valence ba...

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Which one of the following substances will have hydrogen bonds between molecules?


A) (CH3) 3N
B)
CH3
Which one of the following substances will have hydrogen bonds between molecules? A) (CH<sub>3</sub>) <sub>3</sub>N B) CH<sub>3</sub> <sub> </sub> O CH<sub>3</sub> C) CH<sub>3</sub>CH<sub>2</sub> <sub> </sub> OH D) CH<sub>3</sub>CH<sub>2</sub> <sub> </sub> F E) HI O
Which one of the following substances will have hydrogen bonds between molecules? A) (CH<sub>3</sub>) <sub>3</sub>N B) CH<sub>3</sub> <sub> </sub> O CH<sub>3</sub> C) CH<sub>3</sub>CH<sub>2</sub> <sub> </sub> OH D) CH<sub>3</sub>CH<sub>2</sub> <sub> </sub> F E) HI CH3
C)
CH3CH2
Which one of the following substances will have hydrogen bonds between molecules? A) (CH<sub>3</sub>) <sub>3</sub>N B) CH<sub>3</sub> <sub> </sub> O CH<sub>3</sub> C) CH<sub>3</sub>CH<sub>2</sub> <sub> </sub> OH D) CH<sub>3</sub>CH<sub>2</sub> <sub> </sub> F E) HI OH
D)
CH3CH2
Which one of the following substances will have hydrogen bonds between molecules? A) (CH<sub>3</sub>) <sub>3</sub>N B) CH<sub>3</sub> <sub> </sub> O CH<sub>3</sub> C) CH<sub>3</sub>CH<sub>2</sub> <sub> </sub> OH D) CH<sub>3</sub>CH<sub>2</sub> <sub> </sub> F E) HI F
E) HI

F) A) and B)
G) B) and C)

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A metal such with a face-centered cubic lattice will have ________________ atom(s) per unit cell.


A) 1
B) 2
C) 3
D) 4
E) 10

F) C) and D)
G) B) and C)

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Which of the following statements about the packing of monatomic solids with different unit cells is incorrect?


A) The coordination number of atoms in hcp and fcc structures is 12.
B) The coordination number of atoms in simple cubic structures is 6.
C) The coordination number of atoms in bcc structures is 8.
D) A bcc structure has a higher packing efficiency than a simple cubic structure.
E) A bcc structure has a higher packing efficiency than a fcc structure.

F) B) and E)
G) A) and D)

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Some of the information obtained from the heating or cooling curve of a substance can also be found on a phase diagram of that substance.

A) True
B) False

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A) State the essential requirements for hydrogen bonding to be important in a compound. B) List four properties of water which are significantly influenced by the presence of hydrogen bonding.

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a. The compound must contain hydrogen bo...

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, the device/material produced is a/an


A) intrinsic semiconductor.
B) p-type semiconductor.
C) n-type semiconductor.
D) p-n junction.
E) transistor.

F) D) and E)
G) A) and B)

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A 5.00 g sample of water vapor, initially at 155 °\degree C is cooled at atmospheric pressure, producing ice at -55 °\degree C. Calculate the amount of heat energy lost by the water sample in this process, in kJ. Use the following data: specific heat capacity of ice is 2.09 J/g ? K; specific heat capacity of liquid water is 4.18 J/g ? K; specific heat capacity of water vapor is 1.84 J/g ? K; heat of fusion of ice is 336 J/g; heat of vaporization of water is 2260 J/g.


A) 15.6 kJ
B) 10.2 kJ
C) 5.4 kJ
D) 3.2 kJ
E) 1.6 kJ

F) A) and E)
G) A) and B)

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Polonium crystallizes in the simple cubic lattice. What is the coordination number for Po?


A) 3
B) 4
C) 6
D) 8
E) 12

F) A) and D)
G) None of the above

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What word best describes the type of liquid crystal represented in this figure? What word best describes the type of liquid crystal represented in this figure? A) nematic B) cholesteric C) smectic D) isotropic E) elastic


A) nematic
B) cholesteric
C) smectic
D) isotropic
E) elastic

F) None of the above
G) A) and B)

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The phase diagram for xenon has a solid-liquid curve with a positive slope. Which of the following is true?


A) Solid xenon has a higher density than liquid xenon.
B) Solid xenon has the same density as liquid xenon.
C) The phase diagram cannot be used to predict which phase of xenon is denser.
D) Freezing xenon is an endothermic process.
E) None of these choices is correct.

F) B) and E)
G) C) and D)

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Liquid ammonia (boiling point = -33.4 °\degree C) can be used as a refrigerant and heat transfer fluid. How much energy is needed to heat 25.0 g of NH3(l) from -65.0 °\degree C to -12.0 °\degree C? Specific heat capacity, NH3(l) : 4.7 J/(g ? K) Specific heat capacity, NH3(g) : 2.2 J/(g ? K) Heat of vaporization: 23.5 kJ/mol Molar mass, ?: 17.0 g/mol


A) 5.5 kJ
B) 6.3 kJ
C) 39 kJ
D) 340 kJ
E) 590 kJ

F) B) and D)
G) All of the above

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Which of the following is true about kinetic energy, Ek, and potential energy, Ep, when ethyl alcohol at 40 °\degree C is compared with ethyl alcohol at 20 °\degree C?


A) Ek(40 °\degree C) < Ek(20 °\degree C) ; Ep(40 °\degree C) ≈\approx Ep(20 °\degree C)
B) Ek(40 °\degree C) > Ek(20 °\degree C) ; Ep(40 °\degree C) ≈\approx Ep(20 °\degree C)
C) Ep(40 °\degree C) < Ep(20 °\degree C) ; Ek(40 °\degree C) ≈\approx Ek(20 °\degree C)
D) Ep(40 °\degree C) > Ep(20 °\degree C) ; Ek(40 °\degree C) ≈\approx Ek(20 °\degree C)
E) Ep(40 °\degree C) > Ep(20 °\degree C) ; Ek(40 °\degree C) > Ek(20 °\degree C)

F) A) and C)
G) A) and B)

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What types of forces exist between molecules of CO2?


A) hydrogen bonding only.
B) hydrogen bonding and dispersion forces.
C) dipole-dipole forces only.
D) dipole-dipole and dispersion forces.
E) dispersion forces only.

F) A) and B)
G) A) and C)

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Diethyl ether, used as a solvent for extraction of organic compounds from aqueous solutions, has a high vapor pressure which makes it a potential fire hazard in laboratories in which it is used. How much energy is released when 100.0 g is cooled from 53.0 °\degree C to 10.0 °\degree C? Boiling point: 34.5 °\degree C Heat of vaporization: 351 J/g Specific heat capacity, (CH3) 2O(l) : 3.74 J/(g ? K) Specific heat capacity, (CH3) 2O(g) : 2.35 J/(g ? K)


A) 10.1 kJ
B) 13.1 kJ
C) 16.1 kJ
D) 45.2 kJ
E) 48.6 kJ

F) C) and E)
G) A) and D)

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The strongest intermolecular interactions between hydrogen sulfide (H2S) molecules arise from


A) dipole-dipole forces.
B) London dispersion forces.
C) hydrogen bonding.
D) ion-dipole interactions.
E) disulfide linkages.

F) B) and C)
G) A) and E)

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Which of the following statements about ceramics is incorrect?


A) Silicon carbide has a diamond-like structure.
B) Boron nitride can exist in both diamond-like and graphite-like forms.
C) Silicon carbide can be prepared by direct reaction of silicon and carbon.
D) Superconducting ceramics present manufacturing difficulties owing to their brittleness.
E) Superconducting ceramic compounds usually incorporate cobalt in a key role.

F) All of the above
G) A) and B)

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Hexagonal close packing of identical atoms occurs when close-packed layers are stacked in an abcabc.... arrangement.

A) True
B) False

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Which of the following atoms should have the smallest polarizability?


A) Si
B) S
C) Te
D) Bi
E) Br

F) D) and E)
G) B) and D)

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