Question 1

Define bond energy.

Accepted Answer

Bond energy is the e...

Question 2

Use the data given below to construct a Born-Haber cycle to determine the heat of formation of KCl. 
 ΔH∘(kJ mol−1) K(s) →K(g) 89 K(g) →K+(g) +e−418Cl2(g) →2Cl(g) 244Cl(g) +e−→Cl−(g) −349KCl(s) →K+(g) +Cl−(g) 717\begin{array} { l c } & \Delta H ^ { \circ } \left( \mathrm { kJ } 	ext { mol} ^ { - 1 } ight)  \\mathrm { K } ( s )  ightarrow \mathrm { K } ( g )  & 89 \\mathrm {~K} ( g )  ightarrow \mathrm { K } ^ { + } ( g )  + \mathrm { e } ^ { - } & 418 \\mathrm { Cl } 2 ( g )  ightarrow 2 \mathrm { Cl } ( g )  & 244 \\mathrm { Cl } ( g )  + \mathrm { e } ^ { - } ightarrow \mathrm { Cl } ^ { - } ( g )  & - 349 \\mathrm { KCl } ( s )  ightarrow \mathrm { K } ^ { + } ( g )  + \mathrm { Cl } ^ { - } ( g )  & 717\end{array}K(s) →K(g)  K(g) →K+(g) +e−Cl2(g) →2Cl(g) Cl(g) +e−→Cl−(g) KCl(s) →K+(g) +Cl−(g) ​ΔH∘(kJ mol−1) 89418244−349717​

Accepted Answer

A)  -1119 kJ mol-1
B)  -997 kJ mol-1
C)  -437 kJ mol-1
D)  +631 kJ mol-1
E)  +158 kJ mol-1

Question 3

Choose the bond below that is the strongest.

Accepted Answer

A)  N=O
B)  N-I
C)  N-O
D)  N-S
E)  N=N

Question 4

Give the number of valence electrons for SO42-.

Accepted Answer

A)  32
B)  30
C)  34
D)  28
E)  36

Question 5

Identify the compound with the lowest magnitude of lattice energy.

Accepted Answer

A)  KCl
B)  KBr
C)  SrO
D)  CaO

Question 6

Which compound has the highest carbon-carbon bond strength?

Accepted Answer

A)  CH3CH3
B)  CH2CH2
C)  HCCH
D)  All bond strengths are the same.

Question 7

Describe the difference between a pure covalent bond and a polar covalent bond.

Accepted Answer

A pure covalent bond occurs when bonding...

Question 8

Identify the weakest bond.

Accepted Answer

A)  single covalent bond
B)  double covalent bond
C)  triple covalent bond
D)  All of the above bonds are the same strength.

Question 9

Use the bond energies provided to estimate ΔrH° for the reaction below. 2Br2(l) + C2H2(g) → C2H2Br4(l)   \quad ΔrH° = ?
Bond \quad\quad\quad  Bond Energy (kJ mol-1) 
Br-Br  \quad\quad\quad\quad   193
C≡C  \quad\quad\quad\quad\quad  837
C-C  \quad\quad\quad\quad\quad  347
C-Br  \quad\quad\quad\quad\quad 276
C-H  \quad\quad\quad\quad\quad  414

Accepted Answer

A)  +407 kJ mol-1
B)  -324 kJ mol-1
C)  -228 kJ mol-1
D)  +573 kJ mol-1
E)  -648 kJ mol-1

Question 10

Draw the Lewis structure for SO42-.How many equivalent resonance structures can be drawn?

Accepted Answer

A)  6
B)  2
C)  4
D)  3
E)  8

Question 11

Choose the best Lewis structure for NH4+.

Accepted Answer

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Question 12

Choose the best Lewis structure for BF3.

Accepted Answer

A)  3. 
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Question 13

Place the following elements in order of increasing electronegativity. 
K \quad  Cs \quad  P

Accepted Answer

A)  P 
B)  K 
C)  Cs 
D)  Cs 
E)  P < Cs < K

Question 14

Identify the compound with the highest magnitude of lattice energy.

Accepted Answer

A)  NaCl
B)  KCl
C)  LiCl
D)  CsCl

Question 15

Which molecule or compound below contains a pure covalent bond?

Accepted Answer

A)  Li2CO3
B)  SCl6
C)  Cl2
D)  PF3
E)  NaCl

Question 16

Use Lewis theory to determine the chemical formula for the compound formed between Rb and S.

Accepted Answer

A)  RbS
B)  RbS2
C)  Rb2S
D)  Rb2S3
E)  Rb3S2

Question 17

Using periodic trends,place the following bonds in order of decreasing ionic character. 
Sb-Cl  \quad P-Cl  \quad As-Cl

Accepted Answer

A)  Sb-Cl > As-Cl > P-Cl
B)  As-Cl > Sb-Cl > P-Cl
C)  P-Cl > Sb-Cl > As-Cl
D)  P-Cl > As-Cl > Sb-Cl
E)  Sb-Cl > P-Cl > As-Cl

Question 18

Draw the best Lewis structure for CH3+.What is the formal charge on the C?

Accepted Answer

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

Question 19

The iodine atom in I2 would be expected to have a

Accepted Answer

A)  charge of 1-.
B)  partial charge δ-.
C)  partial charge δ+.
D)  charge of 0.

Question 20

Choose the best Lewis structure for SF4.

Accepted Answer

A)  4. 
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Exam 9: Chemical Bonding I: Lewis Theory

Draw the Lewis structure for SO₄²^-.How many equivalent resonance structures can be drawn?

Correct Answer
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Correct Answer
verified

Choose the bond below that is the strongest.

Correct Answer
verified

Define bond energy.

Correct Answer
verified
Bond energy is the e...
View Answer

Which molecule or compound below contains a pure covalent bond?

Correct Answer
verified

Correct Answer
verified

Choose the best Lewis structure for SF₄.

Correct Answer
verified

Choose the best Lewis structure for NH₄⁺.

Correct Answer
verified

Place the following elements in order of increasing electronegativity. K $\quad$ Cs $\quad$ P

Correct Answer
verified

Identify the compound with the highest magnitude of lattice energy.

Correct Answer
verified

Use Lewis theory to determine the chemical formula for the compound formed between Rb and S.

Correct Answer
verified

Draw the best Lewis structure for CH₃⁺.What is the formal charge on the C?

Correct Answer
verified

The iodine atom in I₂ would be expected to have a

Correct Answer
verified

Identify the weakest bond.

Correct Answer
verified

Choose the best Lewis structure for BF₃.

Correct Answer
verified

Give the number of valence electrons for SO₄^2-.

Correct Answer
verified

Describe the difference between a pure covalent bond and a polar covalent bond.

Correct Answer
verified
A pure covalent bond occurs when bonding...
View Answer

Which compound has the highest carbon-carbon bond strength?

Correct Answer
verified

Identify the compound with the lowest magnitude of lattice energy.

Correct Answer
verified

Using periodic trends,place the following bonds in order of decreasing ionic character. Sb-Cl $\quad$ P-Cl $\quad$ As-Cl

Correct Answer
verified

Exam 9: Chemical Bonding I: Lewis Theory

Draw the Lewis structure for SO42-.How many equivalent resonance structures can be drawn?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Choose the bond below that is the strongest.

Correct AnswerverifiedShow Answer

Define bond energy.

Correct AnswerverifiedBond energy is the e...View AnswerShow Answer

Which molecule or compound below contains a pure covalent bond?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Choose the best Lewis structure for SF4.

Correct AnswerverifiedShow Answer

Choose the best Lewis structure for NH4+.

Correct AnswerverifiedShow Answer

Place the following elements in order of increasing electronegativity. K \quad Cs \quad P

Correct AnswerverifiedShow Answer

Identify the compound with the highest magnitude of lattice energy.

Correct AnswerverifiedShow Answer

Use Lewis theory to determine the chemical formula for the compound formed between Rb and S.

Correct AnswerverifiedShow Answer

Draw the best Lewis structure for CH3+.What is the formal charge on the C?

Correct AnswerverifiedShow Answer

The iodine atom in I2 would be expected to have a

Correct AnswerverifiedShow Answer

Identify the weakest bond.

Correct AnswerverifiedShow Answer

Choose the best Lewis structure for BF3.

Correct AnswerverifiedShow Answer

Give the number of valence electrons for SO42-.

Correct AnswerverifiedShow Answer

Describe the difference between a pure covalent bond and a polar covalent bond.

Correct AnswerverifiedA pure covalent bond occurs when bonding...View AnswerShow Answer

Which compound has the highest carbon-carbon bond strength?

Correct AnswerverifiedShow Answer

Identify the compound with the lowest magnitude of lattice energy.

Correct AnswerverifiedShow Answer

Using periodic trends,place the following bonds in order of decreasing ionic character. Sb-Cl \quad P-Cl \quad As-Cl

Correct AnswerverifiedShow Answer

Draw the Lewis structure for SO₄²^-.How many equivalent resonance structures can be drawn?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Bond energy is the e...
View Answer

Correct Answer
verified

Correct Answer
verified

Choose the best Lewis structure for SF₄.

Correct Answer
verified

Choose the best Lewis structure for NH₄⁺.

Correct Answer
verified

Place the following elements in order of increasing electronegativity. K $\quad$ Cs $\quad$ P

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Draw the best Lewis structure for CH₃⁺.What is the formal charge on the C?

Correct Answer
verified

The iodine atom in I₂ would be expected to have a

Correct Answer
verified

Correct Answer
verified

Choose the best Lewis structure for BF₃.

Correct Answer
verified

Give the number of valence electrons for SO₄^2-.

Correct Answer
verified

Correct Answer
verified
A pure covalent bond occurs when bonding...
View Answer

Correct Answer
verified

Correct Answer
verified

Using periodic trends,place the following bonds in order of decreasing ionic character. Sb-Cl $\quad$ P-Cl $\quad$ As-Cl

Correct Answer
verified