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What is the geometry around the central atom in the following molecular model of SI6? What is the geometry around the central atom in the following molecular model of SI<sub>6</sub>? A) trigonal bipyramidal B) octahedral C) square pyramidal D) square planar


A) trigonal bipyramidal
B) octahedral
C) square pyramidal
D) square planar

E) None of the above
F) B) and C)

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Which has the smallest dipole-dipole forces?


A) CH3F
B) HCl
C) N2
D) CO

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

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Which of the following would be expected to have sp2 hybridization on atom A? Which of the following would be expected to have sp<sup>2</sup> hybridization on atom A? A) II B) I and III C) I,II,and III D) I and IV


A) II
B) I and III
C) I,II,and III
D) I and IV

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

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What are the bond angles in the following molecular model of BBr3? What are the bond angles in the following molecular model of BBr<sub>3</sub>? A) less than 109.5° B) 109.5° C) less than 120° but greater than 109.5° D) 120°


A) less than 109.5°
B) 109.5°
C) less than 120° but greater than 109.5°
D) 120°

E) B) and C)
F) A) and D)

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Which compound below could have a zero dipole moment?


A) CCl2F2 (tetrahedral)
B) CuCl2F2 (tetrahedral)
C) PtCl2F2 (square planar)
D) SCl2F2 (see-saw)

E) None of the above
F) All of the above

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Helium can be liquefied when He atoms are attracted to one another by intermolecular ________ forces.

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dispersion...

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The following ball-and-stick molecular model is a representation of the amino acid alanine (unshaded spheres = H) .Only the connections between atoms are shown;multiple bonds and nonbonded electrons are not indicated. The following ball-and-stick molecular model is a representation of the amino acid alanine (unshaded spheres = H) .Only the connections between atoms are shown;multiple bonds and nonbonded electrons are not indicated. -In order to complete an electron-dot structure of alanine,the oxygen atom labeled O<sub>2</sub> needs A) 1 additional bond and 1 nonbonded pair of electrons. B) 1 additional bond and 2 nonbonded pairs of electrons. C) 1 nonbonded pair of electrons. D) 2 nonbonded pairs of electrons. -In order to complete an electron-dot structure of alanine,the oxygen atom labeled O2 needs


A) 1 additional bond and 1 nonbonded pair of electrons.
B) 1 additional bond and 2 nonbonded pairs of electrons.
C) 1 nonbonded pair of electrons.
D) 2 nonbonded pairs of electrons.

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

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Which molecule has a central atom that uses the set of hybrid orbitals shown below to form bonds with the non-central atoms? Which molecule has a central atom that uses the set of hybrid orbitals shown below to form bonds with the non-central atoms? A) H<sub>2</sub>Se B) CS<sub>2</sub> C) NO<sub>2</sub><sup>-</sup> D) ICl<sub>2</sub><sup>-</sup>


A) H2Se
B) CS2
C) NO2-
D) ICl2-

E) A) and C)
F) None of the above

Correct Answer

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Which of the following should have the largest dipole moment?


A) F2(g)
B) SO2(g)
C) RbBr(g)
D) CH2I2(g)

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

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The following MO diagram is appropriate for Li2 and Be2.Based on this diagram, The following MO diagram is appropriate for Li<sub>2</sub> and Be<sub>2</sub>.Based on this diagram, A) both are stable and diamagnetic. B) Li<sub>2</sub> is stable and diamagnetic,but Be<sub>2</sub> is unstable. C) Be<sub>2</sub> is stable and diamagnetic,but Li<sub>2</sub> is unstable. D) Be<sub>2</sub> is stable and paramagnetic,but Li<sub>2</sub> is unstable.


A) both are stable and diamagnetic.
B) Li2 is stable and diamagnetic,but Be2 is unstable.
C) Be2 is stable and diamagnetic,but Li2 is unstable.
D) Be2 is stable and paramagnetic,but Li2 is unstable.

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

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What is the molecular geometry of SbCl3?


A) T-shaped
B) tetrahedral
C) trigonal planar
D) trigonal pyramidal

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

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Which drawing represents the molecular orbital containing the highest energy electrons in the H2 molecule in its ground state?


A)
Which drawing represents the molecular orbital containing the highest energy electrons in the H<sub>2</sub> molecule in its ground state? A) B) C) D)
B)
Which drawing represents the molecular orbital containing the highest energy electrons in the H<sub>2</sub> molecule in its ground state? A) B) C) D)
C)
Which drawing represents the molecular orbital containing the highest energy electrons in the H<sub>2</sub> molecule in its ground state? A) B) C) D)
D)
Which drawing represents the molecular orbital containing the highest energy electrons in the H<sub>2</sub> molecule in its ground state? A) B) C) D)

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

Correct Answer

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What is the geometry around the central atom in the following molecular model of NO2-? What is the geometry around the central atom in the following molecular model of NO<sub>2</sub><sup>-</sup>? A) linear B) bent C) trigonal planar D) trigonal pyramidal


A) linear
B) bent
C) trigonal planar
D) trigonal pyramidal

E) B) and C)
F) A) and D)

Correct Answer

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Shown below is a model of CBr4 having an orientation in which one or more atoms are hidden from view.What is the indicated bond angle? Shown below is a model of CBr<sub>4</sub> having an orientation in which one or more atoms are hidden from view.What is the indicated bond angle? A) less than 109.5° B) 109.5° C) less than 120° but greater than 109.5° D) 120°


A) less than 109.5°
B) 109.5°
C) less than 120° but greater than 109.5°
D) 120°

E) C) and D)
F) A) and B)

Correct Answer

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What are the bond angles in the following molecular model of XeF4? What are the bond angles in the following molecular model of XeF<sub>4</sub>? A) some less than 90° and some less than 120° but greater than 90° B) 90° C) some less than 90° and some less than 180° but greater than 90° D) 90° and 180°


A) some less than 90° and some less than 120° but greater than 90°
B) 90°
C) some less than 90° and some less than 180° but greater than 90°
D) 90° and 180°

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

Correct Answer

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What is the molecular geometry of SeF5-?


A) octahedral
B) seesaw
C) square pyramidal
D) trigonal bipyramidal

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

Correct Answer

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Identify the set of hybrid orbitals shown below. Identify the set of hybrid orbitals shown below. A) sp B) sp<sup>2</sup> C) sp<sup>3</sup> D) sp<sup>4</sup>


A) sp
B) sp2
C) sp3
D) sp4

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

Correct Answer

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Which drawing represents the molecular orbital containing the highest energy electrons in the O22- molecular ion in its the ground state?


A)
Which drawing represents the molecular orbital containing the highest energy electrons in the O<sub>2</sub><sup>2-</sup> molecular ion in its the ground state? A) B) C) D)
B)
Which drawing represents the molecular orbital containing the highest energy electrons in the O<sub>2</sub><sup>2-</sup> molecular ion in its the ground state? A) B) C) D)
C)
Which drawing represents the molecular orbital containing the highest energy electrons in the O<sub>2</sub><sup>2-</sup> molecular ion in its the ground state? A) B) C) D)
D)
Which drawing represents the molecular orbital containing the highest energy electrons in the O<sub>2</sub><sup>2-</sup> molecular ion in its the ground state? A) B) C) D)

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

Correct Answer

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The polarity of CCl4 is ________.

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Are the π-bonds in CH3CO2- delocalized or localized?

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