Question 1

Resonance structures for a substance differ only in the location of multiple bonds and the position of lone electron pairs.

Accepted Answer

A) True 
 B)False

Question 2

What is the total number of bonding electrons in the structure below?

Accepted Answer

A) 5 
B) 10 
C) 20 
D) 30 
A) 5 
B) 10 
C) 20 
D) 30

Question 3

The shapes around the left and right carbon atoms in the structure below are tetrahedral and linear,respectively.

Accepted Answer

A) True 
 B)False

Question 4

A Lewis structure shows the connectivity between atoms in a molecule,as well as where all the bonding and nonbonding valence electrons reside.

Accepted Answer

A) True 
 B)False

Question 5

What is the molecular shape around the phosphorus atom in PH3?

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 6

What is the molecular shape around the nitrogen atom in the structure shown below?

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 7

What is the molecular shape around the oxygen atom in the structure shown below?

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 8

How many total valence electrons does the polyatomic ion OBr- possess?

Accepted Answer

A) 11 
B) 12 
C) 13 
D) 14 
E) 15 
A) 11 
B) 12 
C) 13 
D) 14 
E) 15

Question 9

The Lewis structure for the molecule below is incomplete because it is missing six pairs of nonbonding electrons.

Accepted Answer

A) True 
 B)False

Question 10

Aspartic acid is an amino acid used to synthesize proteins. How many polar bonds are in the aspartic acid structure shown below?

Accepted Answer

A) 4 
B) 6 
C) 9 
D) 12 
E) 15 
A) 4 
B) 6 
C) 9 
D) 12 
E) 15

Question 11

The correct name for SF6 is sulfur heptafluoride.

Accepted Answer

A) True 
 B)False

Question 12

The formula for dinitrogen pentoxide is N5O2.

Accepted Answer

A) True 
 B)False

Question 13

The shape around each carbon atom in the molecule below is trigonal planar.

Accepted Answer

A) True 
 B)False

Question 14

Which of the statements concerning compounds is INCORRECT?

Accepted Answer

A) Compounds are formed when atoms of two or more different elements are chemically bonded. 
B) Ionic compounds are composed of cations and anions. 
C) Covalent compounds are composed of metals and nonmetals. 
D) Covalent compounds are composed of individual molecules. 
A) Compounds are formed when atoms of two or more different elements are chemically bonded. 
B) Ionic compounds are composed of cations and anions. 
C) Covalent compounds are composed of metals and nonmetals. 
D) Covalent compounds are composed of individual molecules.

Question 15

Aspartic acid is an amino acid used to synthesize proteins. How many lone pairs of electrons need to be added to complete the aspartic acid structure shown below?

Accepted Answer

A) 4 
B) 6 
C) 8 
D) 9 
E) 11 
A) 4 
B) 6 
C) 8 
D) 9 
E) 11

Question 16

What is the correct chemical formula of selenium dioxide?

Accepted Answer

A) SO2 
B) SeO2 
C) Se2O 
D) OS2 
A) SO2 
B) SeO2 
C) Se2O 
D) OS2

Question 17

Unequal sharing of electrons in a covalent bond results in a polar bond.

Accepted Answer

A) True 
 B)False

Question 18

Which bond is the LEAST polar?

Accepted Answer

A) C-N 
B) C-O 
C) C-C 
D) C-Cl 
E) C-F 
A) C-N 
B) C-O 
C) C-C 
D) C-Cl 
E) C-F

Question 19

There can be a no more than two resonance structures for a molecule.

Accepted Answer

A) True 
 B)False

Question 20

Identify the correct name for the compound NO2.

Accepted Answer

A) Nitrogen oxide 
B) Dinitrogen monoxide 
C) Nitrogen dioxide 
D) Nitrogen oxate 
E) Nitrate 
A) Nitrogen oxide 
B) Dinitrogen monoxide 
C) Nitrogen dioxide 
D) Nitrogen oxate 
E) Nitrate

Exam 4: Covalent Compounds

Resonance structures for a substance differ only in the location of multiple bonds and the position of lone electron pairs.

What is the total number of bonding electrons in the structure below?

The shapes around the left and right carbon atoms in the structure below are tetrahedral and linear,respectively.

A Lewis structure shows the connectivity between atoms in a molecule,as well as where all the bonding and nonbonding valence electrons reside.

What is the molecular shape around the phosphorus atom in PH3?

What is the molecular shape around the nitrogen atom in the structure shown below?

What is the molecular shape around the oxygen atom in the structure shown below?

How many total valence electrons does the polyatomic ion OBr- possess?

The Lewis structure for the molecule below is incomplete because it is missing six pairs of nonbonding electrons.

Aspartic acid is an amino acid used to synthesize proteins. How many polar bonds are in the aspartic acid structure shown below?

The correct name for SF6 is sulfur heptafluoride.

The formula for dinitrogen pentoxide is N5O2.

The shape around each carbon atom in the molecule below is trigonal planar.

Which of the statements concerning compounds is INCORRECT?

Aspartic acid is an amino acid used to synthesize proteins. How many lone pairs of electrons need to be added to complete the aspartic acid structure shown below?

What is the correct chemical formula of selenium dioxide?

Unequal sharing of electrons in a covalent bond results in a polar bond.

Which bond is the LEAST polar?

There can be a no more than two resonance structures for a molecule.

Identify the correct name for the compound NO2.

Matter and Measurement

Atoms and the Periodic Table

Ionic Compounds

Chemical Reactions

Energy Changes,reaction Rates,and Equilibrium

Gases,liquids,and Solids

Solutions

Acids and Bases

Nuclear Chemistry

Introduction to Organic Molecules and Functional Groups

Alkanes

Unsaturated Hydrocarbons

Organic Compounds That Contain Oxygen,halogen,or Sulfur

The Three-Dimensional Shape of Molecules

Aldehydes and Ketones

Carboxylic Acids,esters,and Amides

Amines and Neurotransmitters

Lipids

Carbohydrates

Amino Acids,proteins,and Enzymes

Nucleic Acids and Protein Synthesis

Metabolism and Energy Production

Carbohydrate,lipid,and Protein Metabolism

Filters

What is the molecular shape around the phosphorus atom in PH₃?

How many total valence electrons does the polyatomic ion OBr^- possess?

The correct name for SF₆ is sulfur heptafluoride.

The formula for dinitrogen pentoxide is N₅O₂.

Identify the correct name for the compound NO₂.