Question 1

Draw the resonance structure that has the lowest formal charge on each atom for BrO2-. What is the formal charge on bromine?

Accepted Answer

A)   -1
B)   +1
C)   0
D)   +2
E)   +3F) A) and D)
G) A) and E)

Question 2

Place the following in order of decreasing magnitude of lattice energy. NaF RbBr KCl

Accepted Answer

A)   RbBr > NaF > KCl
B)   NaF > KCl > RbBr
C)   KCl > NaF > RbBr
D)   NaF > RbBr > KCl
E)   RbBr > KCl > NaFF) All of the above
G) B) and D)

Question 3

Draw the Lewis structure for CO32-, including any valid resonance structures. Which of the following statements is TRUE?

Accepted Answer

A)   The CO32- ion contains one C-O single bond and two C=O double bonds.
B)   The CO32- ion contains three C-O bonds that are equivalent to 4/3 bonds.
C)   The CO32- ion contains three C-O double bonds.
D)   The CO32- ion contains two C-O single bonds and one C≡O triple bond.
E)   None of the above is true.F) A) and B)
G) B) and D)

Question 4

Choose the best Lewis structure for XeI2.

Accepted Answer

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G) A) and B)

Question 5

Draw the resonance structure that has the lowest formal charge on each atom for NO3-. What is the formal charge on nitrogen?

Accepted Answer

A)   -1
B)   +1
C)   0
D)   +2
E)   +3F) A) and D)
G) B) and E)

Question 6

Choose the best Lewis structure for ICl5.

Accepted Answer

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G) A) and E)

Question 7

Which of the following elements can form hypercoordinate compounds?

Accepted Answer

A)   Se
B)   C
C)   Li
D)   FE) A) and B)
F) A) and C)

Question 8

How many lone pairs of electrons are on the As atom in As Cl3?

Accepted Answer

A)   0
B)   1
C)   2
D)   3E) C) and D)
F) B) and C)

Question 9

A triple covalent bond contains ________ of electrons.

Accepted Answer

A)   0 pairs
B)   1 pair
C)   2 pairs
D)   3 pairs
E)   4 pairsF) A) and E)
G) All of the above

Question 10

Give the number of lone pairs for BF3.

Accepted Answer

A)   16
B)   8
C)   14
D)   10
E)   9F) All of the above
G) C) and D)

Question 11

Draw the resonance structure that has the lowest formal charge on each atom for ClO2-. What is the formal charge on chlorine?

Accepted Answer

A)   -1
B)   +1
C)   0
D)   +2
E)   +3F) A) and E)
G) A) and C)

Question 12

Which of the following represent the Lewis structure for Mg?

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) A) and E)
G) C) and D)

Question 13

Choose the bond below that is the weakest.

Accepted Answer

A)   C≡O
B)   N≡N
C)   C-I
D)   C=S
E)   K-ClF) A) and D)
G) A) and C)

Question 14

Use Lewis theory to determine the chemical formula for the compound formed between Al and O.

Accepted Answer

A)   Al3O2
B)   Al2O3
C)   AlO2
D)   Al2O
E)   AlOF) B) and E)
G) D) and E)

Question 15

Identify the longest bond.

Accepted Answer

A)   single covalent bond
B)   double covalent bond
C)   triple covalent bond
D)   All of the above bonds are the same length.E) B) and C)
F) None of the above

Question 16

Which of the following compounds is hypercoordinate?

Accepted Answer

A)   CsI
B)   SnO2
C)   ClF5
D)   ClFE) A) and C)
F) A) and B)

Question 17

Match the following.
-C=N

Accepted Answer

A)  strongest covalent bond
B)  longest covalent bond
C)  weakest ionic bond
D)  metallic bond
E)  highest melting pointF) None of the above
G) A) and D)

Question 18

Use the data given below to construct a Born-Haber cycle to determine the bond energy of O2. 
2.    A)  426 kJ mol-1 B)  249 kJ mol-1 C)  852 kJ mol-1 D)  498 kJ mol-1 E)  356 kJ mol-1" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   426 kJ mol-1
B)   249 kJ mol-1
C)   852 kJ mol-1
D)   498 kJ mol-1
E)   356 kJ mol-1F) C) and D)
G) None of the above

Question 19

Draw the best Lewis structure for BrO4⁻. What is the formal charge on bromine?

Accepted Answer

A)   -1
B)   +1
C)   0
D)   +2
E)   +3F) B) and D)
G) A) and B)

Question 20

Choose the bond below that is the strongest.

Accepted Answer

A)   C-F
B)   C=O
C)   C-I
D)   I-I
E)   C≡NF) A) and B)
G) All of the above

Exam 9: Chemical Bonding I: Lewis Theory

Match the following. -C=N

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How many lone pairs of electrons are on the As atom in As Cl3?

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Draw the best Lewis structure for BrO4⁻. What is the formal charge on bromine?

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Give the number of lone pairs for BF3.

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Draw the resonance structure that has the lowest formal charge on each atom for ClO2-. What is the formal charge on chlorine?

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Choose the bond below that is the strongest.

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Draw the Lewis structure for CO32-, including any valid resonance structures. Which of the following statements is TRUE?

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A triple covalent bond contains ________ of electrons.

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Choose the best Lewis structure for XeI2.

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Draw the resonance structure that has the lowest formal charge on each atom for BrO2-. What is the formal charge on bromine?

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Choose the bond below that is the weakest.

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Draw the resonance structure that has the lowest formal charge on each atom for NO3-. What is the formal charge on nitrogen?

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Use the data given below to construct a Born-Haber cycle to determine the bond energy of O2.

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Choose the best Lewis structure for ICl5.

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Place the following in order of decreasing magnitude of lattice energy. NaF RbBr KCl

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Which of the following elements can form hypercoordinate compounds?

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Use Lewis theory to determine the chemical formula for the compound formed between Al and O.

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Which of the following compounds is hypercoordinate?

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Identify the longest bond.

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Which of the following represent the Lewis structure for Mg?

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How many lone pairs of electrons are on the As atom in As Cl₃?

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Draw the best Lewis structure for BrO₄⁻. What is the formal charge on bromine?

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Give the number of lone pairs for BF₃.

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Draw the resonance structure that has the lowest formal charge on each atom for ClO₂^-. What is the formal charge on chlorine?

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Draw the Lewis structure for CO₃^2-, including any valid resonance structures. Which of the following statements is TRUE?

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Choose the best Lewis structure for XeI₂.

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Draw the resonance structure that has the lowest formal charge on each atom for BrO₂^-. What is the formal charge on bromine?

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Draw the resonance structure that has the lowest formal charge on each atom for NO₃^-. What is the formal charge on nitrogen?

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Use the data given below to construct a Born-Haber cycle to determine the bond energy of O₂.

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Choose the best Lewis structure for ICl₅.

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