Question 1

Determine the electron geometry (eg), molecular geometry (mg), and polarity of SF6.

Accepted Answer

A) eg = trigonal bipyramidal, mg = trigonal bipyramidal, nonpolar 
B) eg = tetrahedral, mg = tetrahedral, polar 
C) eg = trigonal bipyramidal, mg = seesaw, polar 
D) eg = octahedral, mg = trigonal bipyramidal, nonpolar 
E) eg = octahedral, mg = octahedral, nonpolar 
A) eg = trigonal bipyramidal, mg = trigonal bipyramidal, nonpolar 
B) eg = tetrahedral, mg = tetrahedral, polar 
C) eg = trigonal bipyramidal, mg = seesaw, polar 
D) eg = octahedral, mg = trigonal bipyramidal, nonpolar 
E) eg = octahedral, mg = octahedral, nonpolar

Question 2

Use the molecular orbital diagram shown to determine which of the following is least stable.

Accepted Answer

A) C22⁺ 
B) N22⁺ 
C) B2 
D) C22⁻ 
E) B21⁺ 
A) C22⁺ 
B) N22⁺ 
C) B2 
D) C22⁻ 
E) B21⁺

Question 3

A molecule or ion with eight electrons in bonding orbitals and two electrons in an antibonding orbital has a bond order of:

Accepted Answer

A) 1 
B) 1.5 
C) 2 
D) 2.5 
E) 3 
A) 1 
B) 1.5 
C) 2 
D) 2.5 
E) 3

Question 4

Determine the electron geometry for the molecule XeF4.

Accepted Answer

A) Linear 
B) Trigonal planar 
C) Tetrahedral 
D) Trigonal bipyramidal 
E) Octahedral 
A) Linear 
B) Trigonal planar 
C) Tetrahedral 
D) Trigonal bipyramidal 
E) Octahedral

Question 5

Determine the hybridization about each interior atom in the following structure. Sketch the three-dimensional structure and label the interior atoms with their corresponding hybridization.
CH2CHCCCH3

Accepted Answer

The sketch should show all of the approp

Question 6

Use the molecular orbital diagram shown to determine which of the following is paramagnetic.

Accepted Answer

A) B22⁺ 
B) B22⁻ 
C) N22⁺ 
D) C22⁻ 
E) B2 
A) B22⁺ 
B) B22⁻ 
C) N22⁺ 
D) C22⁻ 
E) B2

Question 7

Draw a molecular orbital diagram and use it to determine which of the following is paramagnetic.

Accepted Answer

A) O22⁻ 
B) Ne22⁺ 
C) O22⁺ 
D) F22⁺ 
E) None of the above is paramagnetic. 
A) O22⁻ 
B) Ne22⁺ 
C) O22⁺ 
D) F22⁺ 
E) None of the above is paramagnetic.

Question 8

The VSEPR model predicts the H-O-H bond angle in H3O+ to be

Accepted Answer

A) 60°. 
B) 90°. 
C) less than 109.5° but greater than 90°. 
D) 109.5°. 
A) 60°. 
B) 90°. 
C) less than 109.5° but greater than 90°. 
D) 109.5°.

Question 9

Determine the electron geometry (eg)and molecular geometry (mg)of BrF3.

Accepted Answer

A) eg = trigonal planar, mg = trigonal planar 
B) eg = trigonal bipyramidal, mg = T-shape 
C) eg = trigonal planar, mg = bent 
D) eg = trigonal bipyramidal, mg = seesaw 
E) eg = tetrahedral, mg = trigonal pyramidal 
A) eg = trigonal planar, mg = trigonal planar 
B) eg = trigonal bipyramidal, mg = T-shape 
C) eg = trigonal planar, mg = bent 
D) eg = trigonal bipyramidal, mg = seesaw 
E) eg = tetrahedral, mg = trigonal pyramidal

Question 10

Determine the electron geometry (eg)and molecular geometry (mg)of H2CO.

Accepted Answer

A) eg = tetrahedral, mg = tetrahedral 
B) eg = linear, mg = trigonal planar 
C) eg = trigonal planar, mg = bent 
D) eg = linear, mg = linear 
E) eg = trigonal planar, mg = trigonal planar 
A) eg = tetrahedral, mg = tetrahedral 
B) eg = linear, mg = trigonal planar 
C) eg = trigonal planar, mg = bent 
D) eg = linear, mg = linear 
E) eg = trigonal planar, mg = trigonal planar

Question 11

Match the following.

-sp

Accepted Answer

A) tetrahedral 
B) nonpolar, but contains a polar covalent bond 
C) sp hybridized central atom 
D) trigonal bipyramidal 
E) trigonal planar
F)polar
G)linear
H)seesaw molecular geometry
I)octahedral
J)octahedral electron geometry
K)polar, but contains no polar bonds
L)sp2 hybridized central atom 
A) tetrahedral 
B) nonpolar, but contains a polar covalent bond 
C) sp hybridized central atom 
D) trigonal bipyramidal 
E) trigonal planar
F)polar
G)linear
H)seesaw molecular geometry
I)octahedral
J)octahedral electron geometry
K)polar, but contains no polar bonds
L)sp2 hybridized central atom

Question 12

Determine the electron geometry (eg)and molecular geometry (mg)of XeF2.

Accepted Answer

A) eg = trigonal bipyramidal, mg = bent 
B) eg = linear, mg = linear 
C) eg = tetrahedral, mg = linear 
D) eg = trigonal bipyramidal, mg = linear 
E) eg = tetrahedral, mg = bent 
A) eg = trigonal bipyramidal, mg = bent 
B) eg = linear, mg = linear 
C) eg = tetrahedral, mg = linear 
D) eg = trigonal bipyramidal, mg = linear 
E) eg = tetrahedral, mg = bent

Question 13

Which of the following statements is TRUE?

Accepted Answer

A) The total number of molecular orbitals formed doesn't always equal the number of atomic orbitals in the set. 
B) A bond order of 0 represents a stable chemical bond. 
C) When two atomic orbitals come together to form two molecular orbitals, one molecular orbital will be lower in energy than the two separate atomic orbitals and one molecular orbital will be higher in energy than the separate atomic orbitals. 
D) Electrons placed in antibonding orbitals stabilize the ion/molecule. 
E) All of the above are true. 
A) The total number of molecular orbitals formed doesn't always equal the number of atomic orbitals in the set. 
B) A bond order of 0 represents a stable chemical bond. 
C) When two atomic orbitals come together to form two molecular orbitals, one molecular orbital will be lower in energy than the two separate atomic orbitals and one molecular orbital will be higher in energy than the separate atomic orbitals. 
D) Electrons placed in antibonding orbitals stabilize the ion/molecule. 
E) All of the above are true.

Question 14

Give the approximate bond angle for a molecule with T-shape molecular geometry.

Accepted Answer

A) 90° 
D) <120° 
E) 120° 
A) 90° 
D) <120° 
E) 120°

Question 15

Draw the Lewis structure for the molecule CH3CH2CCH. How many sigma and pi bonds does it contain?

Accepted Answer

A) 11 sigma, 0 pi 
B) 9 sigma, 1 pi 
C) 8 sigma, 3 pi 
D) 9 sigma, 2 pi 
E) 8 sigma, 2 pi 
A) 11 sigma, 0 pi 
B) 9 sigma, 1 pi 
C) 8 sigma, 3 pi 
D) 9 sigma, 2 pi 
E) 8 sigma, 2 pi

Question 16

How many of the following molecules have sp3 hybridization on the central atom? XeCl4 CH4 SF4 C2H2

Accepted Answer

A) 0 
B) 4 
C) 3 
D) 2 
E) 1 
A) 0 
B) 4 
C) 3 
D) 2 
E) 1

Question 17

A molecule containing a central atom with eight electron groups has a(n)________ electron geometry.

Accepted Answer

A) octahedral 
B) trigonal bipyramidal 
C) tetrahedral 
D) trigonal planar 
E) trigonal pyramidal 
A) octahedral 
B) trigonal bipyramidal 
C) tetrahedral 
D) trigonal planar 
E) trigonal pyramidal

Question 18

A molecule or ion with five electrons in bonding orbitals and two electrons in an antibonding orbital has a bond order of:

Accepted Answer

A) 0.5 
B) 1 
C) 1.5 
D) 2 
E) 3 
A) 0.5 
B) 1 
C) 1.5 
D) 2 
E) 3

Question 19

Use molecular orbital theory to determine whether He22⁺ or He2⁺ is more stable. Draw the molecular orbital diagram for each and explain your answer.

Accepted Answer

The molecular orbital diagram should sho

Question 20

Using the VSEPR model, the molecular geometry of the central atom in BF3 is ________.

Accepted Answer

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

Exam 10: Chemical Bonding Ii: Molecular Shapes, Valence Bond Theory, and Molecular Orbital Theory

Determine the electron geometry (eg), molecular geometry (mg), and polarity of SF6.

Use the molecular orbital diagram shown to determine which of the following is least stable.

A molecule or ion with eight electrons in bonding orbitals and two electrons in an antibonding orbital has a bond order of:

Determine the electron geometry for the molecule XeF4.

Determine the hybridization about each interior atom in the following structure. Sketch the three-dimensional structure and label the interior atoms with their corresponding hybridization. CH2CHCCCH3

Use the molecular orbital diagram shown to determine which of the following is paramagnetic.

Draw a molecular orbital diagram and use it to determine which of the following is paramagnetic.

The VSEPR model predicts the H-O-H bond angle in H3O+ to be

Determine the electron geometry (eg)and molecular geometry (mg)of BrF3.

Determine the electron geometry (eg)and molecular geometry (mg)of H2CO.

Match the following. -sp

Determine the electron geometry (eg)and molecular geometry (mg)of XeF2.

Which of the following statements is TRUE?

Give the approximate bond angle for a molecule with T-shape molecular geometry.

Draw the Lewis structure for the molecule CH3CH2CCH. How many sigma and pi bonds does it contain?

How many of the following molecules have sp3 hybridization on the central atom? XeCl4 CH4 SF4 C2H2

A molecule containing a central atom with eight electron groups has a(n)________ electron geometry.

A molecule or ion with five electrons in bonding orbitals and two electrons in an antibonding orbital has a bond order of:

Use molecular orbital theory to determine whether He22⁺ or He2⁺ is more stable. Draw the molecular orbital diagram for each and explain your answer.

Using the VSEPR model, the molecular geometry of the central atom in BF3 is ________.

Units of Measurement for Physical and Chemical Change

Atoms and Elements

Molecules, Compounds, and Nomenclature

Chemical Reactions and Stoichiometry

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Gibbs Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry I: Structures

Organic Chemistry II: Reactions

Biochemistry

Chemistry of the Nonmetals

Metals and Metallury

Transition Metals and Coordination Compounds

Filters

Determine the electron geometry (eg), molecular geometry (mg), and polarity of SF₆.

Determine the electron geometry for the molecule XeF₄.

Determine the hybridization about each interior atom in the following structure. Sketch the three-dimensional structure and label the interior atoms with their corresponding hybridization. CH₂CHCCCH₃

The VSEPR model predicts the H-O-H bond angle in H₃O⁺ to be

Determine the electron geometry (eg)and molecular geometry (mg)of BrF₃.

Determine the electron geometry (eg)and molecular geometry (mg)of H₂CO.

Determine the electron geometry (eg)and molecular geometry (mg)of XeF₂.

Draw the Lewis structure for the molecule CH₃CH₂CCH. How many sigma and pi bonds does it contain?

How many of the following molecules have sp³ hybridization on the central atom? XeCl₄ CH₄ SF₄ C₂H₂

Use molecular orbital theory to determine whether He₂²⁺ or He₂⁺ is more stable. Draw the molecular orbital diagram for each and explain your answer.

Using the VSEPR model, the molecular geometry of the central atom in BF₃ is ________.