Question 1

Why is the C-H bond in ethene (H2C   CH2)shorter and stronger than the C-H bond in ethane (CH3CH3)?

Accepted Answer

The length and strength of a C-H bond de

Question 2

Draw a Lewis structure for the molecule given and show all formal charges.
CH2CO

Accepted Answer

Question 3

Give the formal charge on nitrogen in NH4.

Accepted Answer

A) -2 
B) -1 
C) 0 
D) +1 
E) +2 
A) -2 
B) -1 
C) 0 
D) +1 
E) +2

Question 4

Expand the condensed structure below to show the covalent bonds and the lone-pair electrons.
(CH3)2CHCH2CHO

Accepted Answer

Question 5

BF3 has a dipole moment of zero. Propose a structure for BF3 that is consistent with this information.

Accepted Answer

BF₃ is trig

Question 6

Give the hybridization, shape, and bond angle for each carbon in CH3CN.

Accepted Answer

CH₃- sp³, te

Question 7

Give the hybridizations of the carbons, from left to right, in CH3CH   CHCl.

Accepted Answer

Question 8

What kind of molecular orbital (σ, σ*, π, or π*)results when the two atomic orbitals shown below interact in the manner indicated?

Accepted Answer

The answer of What kind of molecular orbital (σ, σ*,...

Question 9

Give the shape of the methyl radical.

Accepted Answer

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

Question 10

Which bond in the following molecule is the shortest?

Accepted Answer

A) bond 1 
B) bond 2 
C) bond 3 
D) bond 4 
E) bond 5 
A) bond 1 
B) bond 2 
C) bond 3 
D) bond 4 
E) bond 5

Question 11

How many carbon-carbon sigma bonds are in the molecule shown?

Accepted Answer

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

Question 12

The lone-pair electrons of the methyl anion occupy a(n)________ orbital.

Accepted Answer

A) s 
B) p 
C) sp 
D) sp2 
E) sp3 
A) s 
B) p 
C) sp 
D) sp2 
E) sp3

Question 13

Identify the hybridization of carbon in H2CO.

Accepted Answer

A) sp 
B) sp2 
C) sp3 
D) sp4 
E) s3p 
A) sp 
B) sp2 
C) sp3 
D) sp4 
E) s3p

Question 14

Give the number of nonbonding pairs of electrons in H2NOH.

Accepted Answer

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

Question 15

Each lone pair of electrons on the O atom in methanol (CH3OH)occupies a(n)________ orbital.

Accepted Answer

A) s 
B) p 
C) sp 
D) sp2 
E) sp3 
A) s 
B) p 
C) sp 
D) sp2 
E) sp3

Question 16

Which of the following is an sp2 hybridized carbon?

Accepted Answer

A)    
B) ∙ CH3 
C)    
D) A and B 
E) A, B and C 
A)    
B) ∙ CH3 
C)    
D) A and B 
E) A, B and C

Question 17

What kind of molecular orbital (σ, σ*, π, or π*)results when the two atomic orbitals shown below interact in the manner indicated?

Accepted Answer

The answer of What kind of molecular orbital (σ, σ*,...

Question 18

Provide the mathematical equation for the dipole moment of a bond, and identify the variables.

Accepted Answer

μ = e × d, where μ is the bond

Question 19

Which of the following is closest to the C-O-C bond angle in CH3-O-CH3?

Accepted Answer

A) 180° 
B) 120° 
C) 109.5° 
D) 90° 
E) 160° 
A) 180° 
B) 120° 
C) 109.5° 
D) 90° 
E) 160°

Question 20

Which carbon(s)in the following molecule is (are)sp hybridized?

Accepted Answer

A) carbon 1 
B) carbon 2 
C) carbons 1, 3 
D) carbons 4 
E) carbons 4, 5 
A) carbon 1 
B) carbon 2 
C) carbons 1, 3 
D) carbons 4 
E) carbons 4, 5

Exam 1: Remembering General Chemistry: Electronic Structure and Bonding

Why is the C-H bond in ethene (H2C CH2)shorter and stronger than the C-H bond in ethane (CH3CH3)?

Draw a Lewis structure for the molecule given and show all formal charges. CH2CO

Give the formal charge on nitrogen in NH4.

Expand the condensed structure below to show the covalent bonds and the lone-pair electrons. (CH3)2CHCH2CHO

BF3 has a dipole moment of zero. Propose a structure for BF3 that is consistent with this information.

Give the hybridization, shape, and bond angle for each carbon in CH3CN.

Give the hybridizations of the carbons, from left to right, in CH3CH CHCl.

What kind of molecular orbital (σ, σ*, π, or π*)results when the two atomic orbitals shown below interact in the manner indicated?

Give the shape of the methyl radical.

Which bond in the following molecule is the shortest?

How many carbon-carbon sigma bonds are in the molecule shown?

The lone-pair electrons of the methyl anion occupy a(n)________ orbital.

Identify the hybridization of carbon in H2CO.

Give the number of nonbonding pairs of electrons in H2NOH.

Each lone pair of electrons on the O atom in methanol (CH3OH)occupies a(n)________ orbital.

Which of the following is an sp2 hybridized carbon?

What kind of molecular orbital (σ, σ*, π, or π*)results when the two atomic orbitals shown below interact in the manner indicated?

Provide the mathematical equation for the dipole moment of a bond, and identify the variables.

Which of the following is closest to the C-O-C bond angle in CH3-O-CH3?

Which carbon(s)in the following molecule is (are)sp hybridized?

Acids and Bases: Central to Understanding Organic Chemistry

An Introduction to Organic Compounds

Isomers: the Arrangement of Atoms in Space

Alkenes Thermodynamics and Kinetics

Reactions of Alkenes

Reactions of Alkynes Introduction to Multistep Synthesis

Electron Delocalization, Resonance, and Aromaticity More About Molecular Orbital Theory

Substitution Reactions of Alkyl Halides

Elimination Reactions of Alkyl Halides Competition Between Substitution and Elimination

Reactions of Alcohols, Ethers, Epoxides, and Sulfur-Containing Compounds

Organometallic Compounds

Reactions of Alkanes, Radicals

Mass Spectrometry, Infrared Spectroscopy, and Uvvis Spectroscopy

Nmr Spectroscopy

Reactions of Carboxylic Acids and Carboxylic Acid Derivatives

Reactions of Aldehydes and Ketones

Reactions at the Alpha Carbon of Carbonyl Compounds

Reactions of Benzene and Substituted Benzenes

More About Amines Heterocylic Compounds

Carbohydrates

Amino Acids, Peptides, and Proteins

Catalysis

The Organic Mechanisms of the Coenzymes

The Chemistry of Metabolism

Nucleosides, Nucleotides, and Nucleic Acids

Synthetic Polymers

Pericyclic Reactions

Filters

Why is the C-H bond in ethene (H₂C CH₂)shorter and stronger than the C-H bond in ethane (CH₃CH₃)?

Draw a Lewis structure for the molecule given and show all formal charges. CH₂CO

Give the formal charge on nitrogen in NH₄.

Expand the condensed structure below to show the covalent bonds and the lone-pair electrons. (CH₃)₂CHCH₂CHO

BF₃ has a dipole moment of zero. Propose a structure for BF₃ that is consistent with this information.

Give the hybridization, shape, and bond angle for each carbon in CH₃CN.

Give the hybridizations of the carbons, from left to right, in CH₃CH CHCl.

What kind of molecular orbital (σ, σ, π, or π)results when the two atomic orbitals shown below interact in the manner indicated?

Identify the hybridization of carbon in H₂CO.

Give the number of nonbonding pairs of electrons in H₂NOH.

Each lone pair of electrons on the O atom in methanol (CH₃OH)occupies a(n)________ orbital.

Which of the following is an sp² hybridized carbon?

What kind of molecular orbital (σ, σ, π, or π)results when the two atomic orbitals shown below interact in the manner indicated?

Which of the following is closest to the C-O-C bond angle in CH₃-O-CH₃?