Question 1

Atoms with the same number of protons but different numbers of neutrons are called ________.

Accepted Answer

The answer of Atoms with the same number of protons...

Question 2

Draw the important resonance forms for the structure shown below.

Accepted Answer

The answer of Draw the important resonance forms for the...

Question 3

The Ka of formic acid is 1.7 x 10-4. The pKa of formic acid is ________.

Accepted Answer

A)  1.70 
B)  4.00 
C)  -2.36 
D)  3.77 
E)  10.38 
A)  1.70 
B)  4.00 
C)  -2.36 
D)  3.77 
E)  10.38

Question 4

Which sequence correctly ranks the following protons in order of increasing acidity?

Accepted Answer

A)  1 < 2 < 3 
B)  2 < 3 < 1 
C)  3 < 1 < 2 
D)  3 < 2 < 1 
E)  2 < 1 < 3 
A)  1 < 2 < 3 
B)  2 < 3 < 1 
C)  3 < 1 < 2 
D)  3 < 2 < 1 
E)  2 < 1 < 3

Question 5

Peramivir, shown below, has shown to be effective against the influenza B virus (J. Med. Chem. 2010, 6421). Which sequence ranks the following nitrogen atoms in order of increasing basicity?

Accepted Answer

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

Question 6

Draw the line-angle formula for three compounds with molecular formula C3H8O.

Accepted Answer

Question 7

Which of the following bonding patterns of carbon is not allowed in the formation of an organic compound?

Accepted Answer

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

Question 8

Draw 2 possible Lewis structures for the compound with molecular formula C3H6.

Accepted Answer

Question 9

Draw a complete Lewis structure, including lone pairs, for (CH3)2CHCO2H.

Accepted Answer

Question 10

Compute the empirical and molecular formulas for the compound of molecular weight 86 g/mol which is shown to contain 55.8% C and 7.0% H by elemental analysis.

Accepted Answer

The empirical formul

Question 11

Orbitals which are equal in energy are referred to as ________.

Accepted Answer

A)  degenerate 
B)  polar 
C)  nodes 
D)  filled 
E)  nonpolar 
A)  degenerate 
B)  polar 
C)  nodes 
D)  filled 
E)  nonpolar

Question 12

The formal charge on the nitrogen on the structure shown below is:

Accepted Answer

The answer of The formal charge on the nitrogen on...

Question 13

The Lewis structure of trimethylamine is shown below. Draw the condensed structural formula which corresponds to this Lewis structure.

Accepted Answer

The answer of The Lewis structure of trimethylamine is shown...

Question 14

Which of the following terms comes closest to describing an electrophile?

Accepted Answer

A)  anion 
B)  Lewis base 
C)  Lewis acid 
D)  nucleophile 
E)  nonpolar 
A)  anion 
B)  Lewis base 
C)  Lewis acid 
D)  nucleophile 
E)  nonpolar

Question 15

Which of the following acids has the most stable conjugate base?

Accepted Answer

A)  CH3CO2H 
B)  CH3CHO 
C)  CH3CH2OH 
D)  CH3CH2SH 
E)  CH3SO3H 
A)  CH3CO2H 
B)  CH3CHO 
C)  CH3CH2OH 
D)  CH3CH2SH 
E)  CH3SO3H

Question 16

Rank the following compounds in order of increasing basicity: CH3O-, H2N-, H2O, and NH3.

Accepted Answer

Question 17

When a molecule can best be represented as a series of resonance forms, each of these forms always contributes to the same degree in the hybrid.

Accepted Answer

A) True 
 B)False

Question 18

Which is more acidic, methanesulfonic acid (CH3SO3H) or propanoic acid (CH3CH2CO2H)? Explain.

Accepted Answer

Methansulfonic acid is considerably more

Question 19

When methanol (CH3OH) acts as a base, its conjugate acid is ________.

Accepted Answer

A) . -CH2OH 
B)  CH3O- 
C)  CH4OH 
D)  CH3OH2+ 
E)  CH4O+ 
A) . -CH2OH 
B)  CH3O- 
C)  CH4OH 
D)  CH3OH2+ 
E)  CH4O+

Question 20

A node is a region of high electron density between the two atoms in a covalent bond.

Accepted Answer

A) True 
 B)False

Exam 1: Structure and Bonding

Atoms with the same number of protons but different numbers of neutrons are called ________.

Draw the important resonance forms for the structure shown below.

The Ka of formic acid is 1.7 x 10-4. The pKa of formic acid is ________.

Which sequence correctly ranks the following protons in order of increasing acidity?

Peramivir, shown below, has shown to be effective against the influenza B virus (J. Med. Chem. 2010, 6421). Which sequence ranks the following nitrogen atoms in order of increasing basicity?

Draw the line-angle formula for three compounds with molecular formula C3H8O.

Which of the following bonding patterns of carbon is not allowed in the formation of an organic compound?

Draw 2 possible Lewis structures for the compound with molecular formula C3H6.

Draw a complete Lewis structure, including lone pairs, for (CH3)2CHCO2H.

Compute the empirical and molecular formulas for the compound of molecular weight 86 g/mol which is shown to contain 55.8% C and 7.0% H by elemental analysis.

Orbitals which are equal in energy are referred to as ________.

The formal charge on the nitrogen on the structure shown below is:

The Lewis structure of trimethylamine is shown below. Draw the condensed structural formula which corresponds to this Lewis structure.

Which of the following terms comes closest to describing an electrophile?

Which of the following acids has the most stable conjugate base?

Rank the following compounds in order of increasing basicity: CH3O-, H2N-, H2O, and NH3.

When a molecule can best be represented as a series of resonance forms, each of these forms always contributes to the same degree in the hybrid.

Which is more acidic, methanesulfonic acid (CH3SO3H) or propanoic acid (CH3CH2CO2H)? Explain.

When methanol (CH3OH) acts as a base, its conjugate acid is ________.

A node is a region of high electron density between the two atoms in a covalent bond.

Acids and Bases; Functional Groups

Structure and Stereochemistry of Alkanes

The Study of Chemical Reactions

Stereochemistry

Alkyl Halides; Nucleophilic Substitution

Structure and Synthesis of Alkenes; Elimination

Reactions of Alkenes

Structure and Synthesis of Alcohols

Reactions of Alcohols

Infrared Spectroscopy and Mass Spectrometry

Nuclear Magnetic Resonance Spectroscopy

Ethers, Epoxides, and Thioethers

Conjugated Systems, Orbital Symmetry, and Ultraviolet Spectroscopy

Aromatic Compounds

Reactions of Aromatic Compounds

Ketones and Aldehydes

Amines

Carboxylic Acids

Carboxylic Acid Derivatives

Condensations and Alpha Substitutions of Carboxyl Compounds

Carbohydrates and Nucleic Acids

Amino Acids, Peptides, and Proteins

Lipids

Synthetic Polymers

Filters

The Ka of formic acid is 1.7 x 10^-4. The pKa of formic acid is ________.

Draw the line-angle formula for three compounds with molecular formula C₃H₈O.

Draw 2 possible Lewis structures for the compound with molecular formula C₃H₆.

Draw a complete Lewis structure, including lone pairs, for (CH₃)₂CHCO₂H.

Rank the following compounds in order of increasing basicity: CH₃O^-, H₂N^-, H₂O, and NH₃.

Which is more acidic, methanesulfonic acid (CH₃SO₃H) or propanoic acid (CH₃CH₂CO₂H)? Explain.

When methanol (CH₃OH) acts as a base, its conjugate acid is ________.