Question 1

According to molecular orbital (MO)theory,the twelve valence electrons in the O2 molecule are distributed as follows:

Accepted Answer

A) 12 in bonding MOs,0 in antibonding MOs. 
B) 10 in bonding MOs,2 in antibonding MOs. 
C) 9 in bonding MOs,3 in antibonding MOs. 
D) 8 in bonding MOs,4 in antibonding MOs. 
E) 7 in bonding MOs,5 in antibonding MOs. 
A) 12 in bonding MOs,0 in antibonding MOs. 
B) 10 in bonding MOs,2 in antibonding MOs. 
C) 9 in bonding MOs,3 in antibonding MOs. 
D) 8 in bonding MOs,4 in antibonding MOs. 
E) 7 in bonding MOs,5 in antibonding MOs.

Question 2

Indicate the type of hybrid orbitals used by the central atom in SF6.

Accepted Answer

A) sp 
B) sp2 
C) sp3 
D) sp3d 
E) sp3d2 
A) sp 
B) sp2 
C) sp3 
D) sp3d 
E) sp3d2

Question 3

A molecule with the formula AB4 and a tetrahedral molecular geometry uses _________ to form its σ bonds.

Accepted Answer

A) sp hybrid orbitals 
B) sp2 hybrid orbitals 
C) sp3 hybrid orbitals 
D) sp3d hybrid orbitals 
E) sp3d2 hybrid orbitals 
A) sp hybrid orbitals 
B) sp2 hybrid orbitals 
C) sp3 hybrid orbitals 
D) sp3d hybrid orbitals 
E) sp3d2 hybrid orbitals

Question 4

What is the total number of electron domains around the central atom for a molecule having a trigonal pyramidal molecular geometry,such as NH3?

Accepted Answer

A) 5 
B) 2 
C) 3 
D) 4 
E) 6 
A) 5 
B) 2 
C) 3 
D) 4 
E) 6

Question 5

The PCl5 molecule has

Accepted Answer

A) nonpolar bonds,and is a nonpolar molecule. 
B) nonpolar bonds,but is a polar molecule. 
C) polar bonds,and is a polar molecule. 
D) polar bonds,but is a nonpolar molecule. 
A) nonpolar bonds,and is a nonpolar molecule. 
B) nonpolar bonds,but is a polar molecule. 
C) polar bonds,and is a polar molecule. 
D) polar bonds,but is a nonpolar molecule.

Question 6

Which is true concerning the molecular geometry of SF6?

Accepted Answer

A) The predicted F-S-F bond angle is 60°. 
B) The predicted F-S-F bond angle is 90°. 
C) The predicted F-S-F bond angles are 90° and 120°. 
D) The predicted F-S-F bond angles are 90° and 180°. 
E) The predicted F-S-F bond angles are 60°,120°,and 180°. 
A) The predicted F-S-F bond angle is 60°. 
B) The predicted F-S-F bond angle is 90°. 
C) The predicted F-S-F bond angles are 90° and 120°. 
D) The predicted F-S-F bond angles are 90° and 180°. 
E) The predicted F-S-F bond angles are 60°,120°,and 180°.

Question 7

The number of lone pairs on the central atom is used to determine the ____________.

Accepted Answer

The answer of The number of lone pairs on the...

Question 8

According to the VSEPR model,a molecule with the general formula AB3 with no lone pairs on the central atom will have a ______ molecular shape.

Accepted Answer

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

Question 9

Consider the species N2-,N2,and N2+.Which of these species will be paramagnetic?

Accepted Answer

A) N2 and N2- 
B) N2+ and N2 
C) N2+ and N2- 
D) N2-,N2,and N2+ 
E) None is paramagnetic. 
A) N2 and N2- 
B) N2+ and N2 
C) N2+ and N2- 
D) N2-,N2,and N2+ 
E) None is paramagnetic.

Question 10

Use the VSEPR model to predict the molecular geometry of CO32−.

Accepted Answer

Question 11

Which is the most reasonable prediction for the H-O-H bond angle in H2O?

Accepted Answer

A) 90° 
B) 109.5° 
C) 120° 
D) 107° 
E) 105° 
A) 90° 
B) 109.5° 
C) 120° 
D) 107° 
E) 105°

Question 12

A molecule which contains polar bonds will always have a dipole moment.

Accepted Answer

A) True 
 B)False

Question 13

What is the molecular geometry of NO2- as predicted by the VSEPR model?

Accepted Answer

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

Question 14

How many π bonds are there in one molecule of acrylonitrile (shown below)?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 5 
E) 9 
A) 1 
B) 2 
C) 3 
D) 5 
E) 9

Question 15

What is the number of lone electron pairs on the central atom of a molecule having a linear molecular geometry,such as CO2?

Accepted Answer

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

Question 16

What is the total number of electron domains around the central atom for a molecule having a square planar molecular geometry,such as XeBr4?

Accepted Answer

A) 2 
B) 3 
C) 4 
D) 5 
E) 6 
A) 2 
B) 3 
C) 4 
D) 5 
E) 6

Question 17

According to the VSEPR model,what is the predicted electron-domain geometry around the central iodine atom in the ion lF2- ?

Accepted Answer

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

Question 18

Which one of the following molecules has a zero dipole moment?

Accepted Answer

A) CO 
B) CH2Cl2 
C) SO3 
D) SO2 
E) NH3 
A) CO 
B) CH2Cl2 
C) SO3 
D) SO2 
E) NH3

Question 19

What is the total number of electron domains around the central atom for a molecule having a square pyramidal molecular geometry,such as ClF5?

Accepted Answer

A) 5 
B) 2 
C) 3 
D) 4 
E) 6 
A) 5 
B) 2 
C) 3 
D) 4 
E) 6

Question 20

Which molecular formula corresponds to a structural formula with carbon atoms having hybridizations of sp,sp2,and sp3?

Accepted Answer

A) C3H6 
B) C4H4 
C) C4H6 
D) C5H6 
E) C5H8 
A) C3H6 
B) C4H4 
C) C4H6 
D) C5H6 
E) C5H8

Exam 9: Chemical Bonding Ii Molecular Geometry and Bonding Theories

According to molecular orbital (MO)theory,the twelve valence electrons in the O2 molecule are distributed as follows:

Indicate the type of hybrid orbitals used by the central atom in SF6.

A molecule with the formula AB4 and a tetrahedral molecular geometry uses _________ to form its σ bonds.

What is the total number of electron domains around the central atom for a molecule having a trigonal pyramidal molecular geometry,such as NH3?

The PCl5 molecule has

Which is true concerning the molecular geometry of SF6?

The number of lone pairs on the central atom is used to determine the ____________.

According to the VSEPR model,a molecule with the general formula AB3 with no lone pairs on the central atom will have a ______ molecular shape.

Consider the species N2-,N2,and N2+.Which of these species will be paramagnetic?

Use the VSEPR model to predict the molecular geometry of CO32−.

Which is the most reasonable prediction for the H-O-H bond angle in H2O?

A molecule which contains polar bonds will always have a dipole moment.

What is the molecular geometry of NO2- as predicted by the VSEPR model?

How many π bonds are there in one molecule of acrylonitrile (shown below)?

What is the number of lone electron pairs on the central atom of a molecule having a linear molecular geometry,such as CO2?

What is the total number of electron domains around the central atom for a molecule having a square planar molecular geometry,such as XeBr4?

According to the VSEPR model,what is the predicted electron-domain geometry around the central iodine atom in the ion lF2- ?

Which one of the following molecules has a zero dipole moment?

What is the total number of electron domains around the central atom for a molecule having a square pyramidal molecular geometry,such as ClF5?

Which molecular formula corresponds to a structural formula with carbon atoms having hybridizations of sp,sp2,and sp3?

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Stoichiometry Ratios of Combination

Reactions in Aqueous Solutions

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Electron Configuration and the Periodic Table

Chemical Bonding I Basic Concepts

Gases

Intermolecular Forces and the Physical Properties of Liquids and Solids

Modern Materials

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Entropy Free Energy and Equilibrium

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Nonmetallic Elements and Their Compounds

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Filters

According to molecular orbital (MO)theory,the twelve valence electrons in the O₂ molecule are distributed as follows:

Indicate the type of hybrid orbitals used by the central atom in SF₆.

A molecule with the formula AB₄ and a tetrahedral molecular geometry uses _________ to form its σ bonds.

What is the total number of electron domains around the central atom for a molecule having a trigonal pyramidal molecular geometry,such as NH₃?

The PCl₅ molecule has

Which is true concerning the molecular geometry of SF₆?

According to the VSEPR model,a molecule with the general formula AB₃ with no lone pairs on the central atom will have a ______ molecular shape.

Consider the species N₂^-,N₂,and N₂⁺.Which of these species will be paramagnetic?

Use the VSEPR model to predict the molecular geometry of CO₃²⁻.

Which is the most reasonable prediction for the H-O-H bond angle in H₂O?

What is the molecular geometry of NO₂^- as predicted by the VSEPR model?

What is the number of lone electron pairs on the central atom of a molecule having a linear molecular geometry,such as CO₂?

What is the total number of electron domains around the central atom for a molecule having a square planar molecular geometry,such as XeBr₄?

According to the VSEPR model,what is the predicted electron-domain geometry around the central iodine atom in the ion lF₂^- ?

What is the total number of electron domains around the central atom for a molecule having a square pyramidal molecular geometry,such as ClF₅?

Which molecular formula corresponds to a structural formula with carbon atoms having hybridizations of sp,sp²,and sp³?