Question 1

Which of the following covalent bonds is the most polar (i.e., highest percent ionic character)

Accepted Answer

A)   Al - I
B)   Si - I
C)   Al - Cl
D)   Si - Cl
E)   Si - PF) C) and D)
G) D) and E)

Question 2

The number of resonance structures for the sulfur dioxide molecule that satisfy the octet rule is

Accepted Answer

A)   1.
B)   2.
C)   3.
D)   4.
E)   None of these.F) B) and D)
G) B) and E)

Question 3

What is the formal charge on the oxygen atom in N2O (the atomic order is N-N-O)

Accepted Answer

A)   -2
B)   -1
C)   0
D)   +1
E)   +2F) A) and E)
G) A) and D)

Question 4

In the Lewis structure of the iodate ion, IO3-, that satisfies the octet rule, the formal charge on the central iodine atom is

Accepted Answer

A)   +2.
B)   +1.
C)   0.
D)   -1.
E)   -2.F) D) and E)
G) B) and D)

Question 5

The following reaction correctly shows the chemical equation for which the enthalpy of reaction is the lattice energy of KCl(s).KCl(s) $\rarr$K+(g) + Cl - (g)

Accepted Answer

A) True 
 B)False

Question 6

The following Lewis structure for OF2 uses how many valence electrons 
2 uses how many valence electrons    A)  16 B)  18 C)  20 D)  zero E)  None of the above" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   16
B)   18
C)   20
D)   zero
E)   None of the aboveF) A) and D)
G) A) and E)

Question 7

List all types of bonding present in the compound CaCO3.
I. ionic bond 
II. polar covalent bond
III. nonpolar covalent bond

Accepted Answer

A)   I only
B)   II only
C)   III only
D)   I and II
E)   II and IIIF) A) and E)
G) C) and E)

Question 8

The total number of valence electrons in the ion SO42- is

Accepted Answer

A)   24.
B)   26.
C)   28.
D)   30.
E)   32.F) C) and D)
G) All of the above

Question 9

How many covalent bonds will be drawn to bromine in BrO3- for the dot structure that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s)

Accepted Answer

A)   3
B)   4
C)   5
D)   6
E)   7F) B) and D)
G) B) and E)

Question 10

The total number of bonding electrons in a molecule of formaldehyde (H2CO)  is

Accepted Answer

A)   3.
B)   4.
C)   6.
D)   8.
E)   18.F) B) and C)
G) A) and E)

Question 11

The Lewis structure reveals a triple bond in which of the following molecules

Accepted Answer

A)   Br2
B)   O2
C)   N2
D)   H2
E)   CH4F) C) and D)
G) B) and C)

Question 12

The Lewis dot symbol for the S 2- ion is

Accepted Answer

A)   2- ion is 
A)     
B)     
C)   S2- 
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
B)   2- ion is 
A)     
B)     
C)   S2- 
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
C)   S2-
D)   2- ion is 
A)     
B)     
C)   S2- 
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
E)   2- ion is 
A)     
B)     
C)   S2- 
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >F) D) and E)
G) C) and D)

Question 13

Use bond energies to estimate the enthalpy of formation of HBr(g) .
BE(H-H)  = 436 kJ/mol 
BE(Br-Br)  = 192 kJ/mol
BE(H-Br)  = 366 kJ/mol

Accepted Answer

A)   +262 kJ/mol
B)   +104 kJ/mol
C)   +52 kJ/mol
D)   -52 kJ/mol
E)   -104 kJ/molF) A) and B)
G) None of the above

Question 14

Which of the following solids would have the highest melting point

Accepted Answer

A)   NaI
B)   NaF
C)   MgO
D)   MgCl2
E)   KFF) B) and E)
G) All of the above

Question 15

Nitrous oxide, N2O, is sometimes called "laughing gas". What is the formal charge on the central nitrogen atom in the most favorable Lewis structure for nitrous oxide based on minimizing formal charge overall (The atom connectivity is N-N-O.)

Accepted Answer

A)   -2
B)   -1
C)   0
D)   +1
E)   +2F) A) and E)
G) None of the above

Question 16

Which one of the following is most likely to be a covalent compound

Accepted Answer

A)   Rb2O
B)   BaO
C)   SrO
D)   SeO2
E)   MnO2F) C) and D)
G) B) and E)

Exam 9: Chemical Bonding I: Basic Concepts

List all types of bonding present in the compound CaCO₃. I. ionic bond II. polar covalent bond III. nonpolar covalent bond

Correct Answer
verified

Nitrous oxide, N₂O, is sometimes called "laughing gas". What is the formal charge on the central nitrogen atom in the most favorable Lewis structure for nitrous oxide based on minimizing formal charge overall (The atom connectivity is N-N-O.)

Correct Answer
verified

The Lewis dot symbol for the S ^2- ion is

Correct Answer
verified

The number of resonance structures for the sulfur dioxide molecule that satisfy the octet rule is

Correct Answer
verified

Use bond energies to estimate the enthalpy of formation of HBr(g) . BE(H-H) = 436 kJ/mol BE(Br-Br) = 192 kJ/mol BE(H-Br) = 366 kJ/mol

Correct Answer
verified

How many covalent bonds will be drawn to bromine in BrO₃^- for the dot structure that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s)

Correct Answer
verified

The total number of valence electrons in the ion SO₄^2- is

Correct Answer
verified

Which of the following covalent bonds is the most polar (i.e., highest percent ionic character)

Correct Answer
verified

In the Lewis structure of the iodate ion, IO₃^-, that satisfies the octet rule, the formal charge on the central iodine atom is

Correct Answer
verified

Which one of the following is most likely to be a covalent compound

Correct Answer
verified

The following reaction correctly shows the chemical equation for which the enthalpy of reaction is the lattice energy of KCl(s).KCl(s) $\rarr$ K⁺(g) + Cl ^- (g)

Correct Answer
verified

Which of the following solids would have the highest melting point

Correct Answer
verified

What is the formal charge on the oxygen atom in N₂O (the atomic order is N-N-O)

Correct Answer
verified

The following Lewis structure for OF₂ uses how many valence electrons

Correct Answer
verified

The Lewis structure reveals a triple bond in which of the following molecules

Correct Answer
verified

The total number of bonding electrons in a molecule of formaldehyde (H₂CO) is

Correct Answer
verified

Exam 9: Chemical Bonding I: Basic Concepts

List all types of bonding present in the compound CaCO3. I. ionic bond II. polar covalent bond III. nonpolar covalent bond

Correct AnswerverifiedShow Answer

Nitrous oxide, N2O, is sometimes called "laughing gas". What is the formal charge on the central nitrogen atom in the most favorable Lewis structure for nitrous oxide based on minimizing formal charge overall (The atom connectivity is N-N-O.)

Correct AnswerverifiedShow Answer

The Lewis dot symbol for the S 2- ion is

Correct AnswerverifiedShow Answer

The number of resonance structures for the sulfur dioxide molecule that satisfy the octet rule is

Correct AnswerverifiedShow Answer

Use bond energies to estimate the enthalpy of formation of HBr(g) . BE(H-H) = 436 kJ/mol BE(Br-Br) = 192 kJ/mol BE(H-Br) = 366 kJ/mol

Correct AnswerverifiedShow Answer

How many covalent bonds will be drawn to bromine in BrO3- for the dot structure that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s)

Correct AnswerverifiedShow Answer

The total number of valence electrons in the ion SO42- is

Correct AnswerverifiedShow Answer

Which of the following covalent bonds is the most polar (i.e., highest percent ionic character)

Correct AnswerverifiedShow Answer

In the Lewis structure of the iodate ion, IO3-, that satisfies the octet rule, the formal charge on the central iodine atom is

Correct AnswerverifiedShow Answer

Which one of the following is most likely to be a covalent compound

Correct AnswerverifiedShow Answer

The following reaction correctly shows the chemical equation for which the enthalpy of reaction is the lattice energy of KCl(s).KCl(s) →\rarr→ K+(g) + Cl - (g)

Correct AnswerverifiedShow Answer

Which of the following solids would have the highest melting point

Correct AnswerverifiedShow Answer

What is the formal charge on the oxygen atom in N2O (the atomic order is N-N-O)

Correct AnswerverifiedShow Answer

The following Lewis structure for OF2 uses how many valence electrons

Correct AnswerverifiedShow Answer

The Lewis structure reveals a triple bond in which of the following molecules

Correct AnswerverifiedShow Answer

The total number of bonding electrons in a molecule of formaldehyde (H2CO) is

Correct AnswerverifiedShow Answer

List all types of bonding present in the compound CaCO₃. I. ionic bond II. polar covalent bond III. nonpolar covalent bond

Correct Answer
verified

Nitrous oxide, N₂O, is sometimes called "laughing gas". What is the formal charge on the central nitrogen atom in the most favorable Lewis structure for nitrous oxide based on minimizing formal charge overall (The atom connectivity is N-N-O.)

Correct Answer
verified

The Lewis dot symbol for the S ^2- ion is

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

How many covalent bonds will be drawn to bromine in BrO₃^- for the dot structure that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s)

Correct Answer
verified

The total number of valence electrons in the ion SO₄^2- is

Correct Answer
verified

Correct Answer
verified

In the Lewis structure of the iodate ion, IO₃^-, that satisfies the octet rule, the formal charge on the central iodine atom is

Correct Answer
verified

Correct Answer
verified

The following reaction correctly shows the chemical equation for which the enthalpy of reaction is the lattice energy of KCl(s).KCl(s) $\rarr$ K⁺(g) + Cl ^- (g)

Correct Answer
verified

Correct Answer
verified

What is the formal charge on the oxygen atom in N₂O (the atomic order is N-N-O)

Correct Answer
verified

The following Lewis structure for OF₂ uses how many valence electrons

Correct Answer
verified

Correct Answer
verified

The total number of bonding electrons in a molecule of formaldehyde (H₂CO) is

Correct Answer
verified