Question 1

Draw the Lewis dot structure for Al3+.

Accepted Answer

The Al should have n...

Question 2

Give the number of valence electrons for SF4.

Accepted Answer

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

Question 3

The compound ClF  contains

Accepted Answer

A)  ionic bonds.
B)  nonpolar covalent bonds.
C)  polar covalent bonds with partial negative charges on the F atoms.
D)  polar covalent bonds with partial negative charges on the Cl atoms.

Question 4

Choose the best Lewis structure for SO42-.

Accepted Answer

A)  42-. 
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B)  42-. 
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C)  42-. 
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D)  42-. 
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E)  42-. 
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Question 5

Choose the bond below that is least polar.

Accepted Answer

A)  P-F
B)  C-Br
C)  C-F
D)  C-I
E)  C-Cl

Question 6

Identify the substance that conducts electricity.

Accepted Answer

A)  NaCl dissolved in water
B)  solid NaCl
C)  water
D)  solid sugar
E)  sugar dissolved in water

Question 7

Choose the bond below that is the weakest.

Accepted Answer

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

Question 8

Choose the bond below that is the weakest.

Accepted Answer

A)  Na-Cl
B)  I-I
C)  C=N
D)  Li-F
E)  C=O

Question 9

Identify the compound or element with metallic bonding.

Accepted Answer

A)  NaCl
B)  Li
C)  H2O
D)  He
E)  S

Question 10

Choose the best Lewis structure for SeO42-.

Accepted Answer

A)  42-. 
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B)  42-. 
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C)  42-. 
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D)  42-. 
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E)  42-. 
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Question 11

The Lewis structure of BrO3- is as follows:  What is the formal charge on Br atom?

Accepted Answer

Question 12

Which molecule or compound below contains a polar covalent bond?

Accepted Answer

A)  C2H4
B)  ZnS
C)  LiI
D)  NCl3
E)  AgCl D

Question 13

Which of the following represent the Lewis structure for Ca2+?

Accepted Answer

A)    Ca:2+\mathrm { Ca } : ^ { 2 + }Ca:2+ 
B)     Ca: 	ext { Ca: } Ca:  
C)   2+? 
A)    \mathrm { Ca } : ^ { 2 + }  
B)    	ext { Ca: }  
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D)   2+? 
A)    \mathrm { Ca } : ^ { 2 + }  
B)    	ext { Ca: }  
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E)    Ca2+\mathrm { Ca } ^ { 2 + }Ca2+

Question 14

Identify the number of valence electrons for XeI2.

Accepted Answer

A)  22
B)  20
C)  18
D)  24

Question 15

Place the following elements in order of increasing electronegativity. 
Sr \quad  N  \quad Na

Accepted Answer

A)  Sr 
B)  Na 
C)  Sr 
D)  N 
E)  N < Na < Sr  A

Question 16

Which of the following processes is exothermic?

Accepted Answer

A)  Cl2(g) → 2Cl(g) 
B)  Br(g) + e- → Br- (g) 
C)  Li(s) → Li(g) 
D)  NaF(s) → Na+ (g) + F- (g) 
E)  None of the above processes is exothermic.

Question 17

Using periodic trends,place the following bonds in order of increasing ionic character. 
Si-P  \quad Si-Cl  \quad Si-S

Accepted Answer

A)  Si-P 
B)  Si-P 
C)  Si-S 
D)  Si-Cl 
E)  Si-Cl < Si-S < Si-P

Question 18

Using Lewis structures and formal charge,which of the following ions is most stable? 
OCN-  \quad ONC-  \quad NOC-

Accepted Answer

A)  OCN-
B)  ONC-
C)  NOC-
D)  None of these ions is stable according to Lewis theory.  A

Question 19

Use the data given below to construct a Born-Haber cycle to determine the second ionization energy of Ca. 
 ΔH∘(kJmol−1) Ca(s) →Ca(g) 193Ca(g) →Ca+(g) +e−5902O(g) →O2(g) −498O(g) +e−→O−(g) −141O−(g) +e−→O2−(g) 878Ca(s) +12O2(g) →CaO(s) −635Ca2+(g) +O2−(g) →CaO(s) −3414\begin{array} { l c } & \Delta H ^ { \circ } \left( \mathrm { kJ } \mathrm { mol } ^ { - 1 } ight)  \\mathrm { Ca } ( s )  ightarrow \mathrm { Ca } ( g )  & 193 \\mathrm { Ca } ( g )  ightarrow \mathrm { Ca } ^ { + } ( g )  + \mathrm { e } ^ { - } & 590 \2 \mathrm { O } ( g )  ightarrow \mathrm { O } _ { 2 } ( g )  & - 498 \\mathrm { O } ( g )  + \mathrm { e } ^ { - } ightarrow \mathrm { O } ^ { - } ( g )  & - 141 \\mathrm { O } ^ { - } ( g )  + \mathrm { e } ^ { - } ightarrow \mathrm { O } ^ { 2 - } ( g )  & 878 \\mathrm { Ca } ( s )  + \frac { 1 } { 2 } \mathrm { O } _ { 2 } ( g )  ightarrow \mathrm { CaO } ( s )  & - 635 \\mathrm { Ca } ^ { 2 + } ( g )  + \mathrm { O } ^ { 2 - } ( g )  ightarrow \mathrm { CaO } ( s )  & - 3414\end{array}Ca(s) →Ca(g) Ca(g) →Ca+(g) +e−2O(g) →O2​(g) O(g) +e−→O−(g) O−(g) +e−→O2−(g) Ca(s) +21​O2​(g) →CaO(s) Ca2+(g) +O2−(g) →CaO(s) ​ΔH∘(kJmol−1) 193590−498−141878−635−3414​

Accepted Answer

A)  1010 kJ mol-1
B)  1757 kJ mol-1
C)  1508 kJ mol-1
D)  -3027 kJ mol-1
E)  -1514 kJ mol-1

Question 20

Use the bond energies provided to estimate ΔrH° for the reaction below. 
XeF2 + 2F2 → XeF6 ΔrH° = ?
Bond  \quad\quad Bond Energy (kJ mol-1) 
Xe-F  \quad\quad\quad\quad 147
F-F  \quad\quad\quad\quad  159

Accepted Answer

A)  -429 kJ mol-1
B)  +159 kJ mol-1
C)  -660 kJ mol-1
D)  +176 kJ mol-1
E)  -270 kJ mol-1

Exam 9: Chemical Bonding I: Lewis Theory

Draw the Lewis dot structure for Al³⁺.

Correct Answer
verified
The Al should have n...
View Answer

Give the number of valence electrons for SF₄.

Correct Answer
verified

The compound ClF contains

Correct Answer
verified

Choose the best Lewis structure for SO₄²^-.

Correct Answer
verified

Choose the bond below that is least polar.

Correct Answer
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Identify the substance that conducts electricity.

Correct Answer
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Choose the bond below that is the weakest.

Correct Answer
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Choose the bond below that is the weakest.

Correct Answer
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Identify the compound or element with metallic bonding.

Correct Answer
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Choose the best Lewis structure for SeO₄²^-.

Correct Answer
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The Lewis structure of BrO₃^- is as follows: What is the formal charge on Br atom?

Correct Answer
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Which molecule or compound below contains a polar covalent bond?

Correct Answer
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D

Which of the following represent the Lewis structure for Ca²⁺?

Correct Answer
verified

Identify the number of valence electrons for XeI₂.

Correct Answer
verified

Place the following elements in order of increasing electronegativity. Sr $\quad$ N $\quad$ Na

Correct Answer
verified
A

Which of the following processes is exothermic?

Correct Answer
verified

Using periodic trends,place the following bonds in order of increasing ionic character. Si-P $\quad$ Si-Cl $\quad$ Si-S

Correct Answer
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Using Lewis structures and formal charge,which of the following ions is most stable? OCN^- $\quad$ ONC^- $\quad$ NOC^-

Correct Answer
verified
A

Correct Answer
verified

Use the bond energies provided to estimate Δ_rH° for the reaction below. XeF₂₊2F₂ → XeF₆ Δ_rH°= ? Bond $\quad$ $\quad$ Bond Energy (kJ mol^-1) Xe-F $\quad$ $\quad$ $\quad$ $\quad$ 147 F-F $\quad$ $\quad$ $\quad$ $\quad$ 159

Correct Answer
verified

Exam 9: Chemical Bonding I: Lewis Theory

Draw the Lewis dot structure for Al3+.

Correct AnswerverifiedThe Al should have n...View AnswerShow Answer

Give the number of valence electrons for SF4.

Correct AnswerverifiedShow Answer

The compound ClF contains

Correct AnswerverifiedShow Answer

Choose the best Lewis structure for SO42-.

Correct AnswerverifiedShow Answer

Choose the bond below that is least polar.

Correct AnswerverifiedShow Answer

Identify the substance that conducts electricity.

Correct AnswerverifiedShow Answer

Choose the bond below that is the weakest.

Correct AnswerverifiedShow Answer

Choose the bond below that is the weakest.

Correct AnswerverifiedShow Answer

Identify the compound or element with metallic bonding.

Correct AnswerverifiedShow Answer

Choose the best Lewis structure for SeO42-.

Correct AnswerverifiedShow Answer

The Lewis structure of BrO3- is as follows: What is the formal charge on Br atom?

Correct AnswerverifiedShow Answer

Which molecule or compound below contains a polar covalent bond?

Correct AnswerverifiedD

Which of the following represent the Lewis structure for Ca2+?

Correct AnswerverifiedShow Answer

Identify the number of valence electrons for XeI2.

Correct AnswerverifiedShow Answer

Place the following elements in order of increasing electronegativity. Sr \quad N \quad Na

Correct AnswerverifiedA

Which of the following processes is exothermic?

Correct AnswerverifiedShow Answer

Using periodic trends,place the following bonds in order of increasing ionic character. Si-P \quad Si-Cl \quad Si-S

Correct AnswerverifiedShow Answer

Using Lewis structures and formal charge,which of the following ions is most stable? OCN- \quad ONC- \quad NOC-

Correct AnswerverifiedA

Correct AnswerverifiedShow Answer

Use the bond energies provided to estimate ΔrH° for the reaction below. XeF2 + 2F2 → XeF6 ΔrH° = ? Bond \quad\quad Bond Energy (kJ mol-1) Xe-F \quad\quad\quad\quad 147 F-F \quad\quad\quad\quad 159

Correct AnswerverifiedShow Answer

Draw the Lewis dot structure for Al³⁺.

Correct Answer
verified
The Al should have n...
View Answer

Give the number of valence electrons for SF₄.

Correct Answer
verified

Correct Answer
verified

Choose the best Lewis structure for SO₄²^-.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Choose the best Lewis structure for SeO₄²^-.

Correct Answer
verified

The Lewis structure of BrO₃^- is as follows: What is the formal charge on Br atom?

Correct Answer
verified

Correct Answer
verified
D

Which of the following represent the Lewis structure for Ca²⁺?

Correct Answer
verified

Identify the number of valence electrons for XeI₂.

Correct Answer
verified

Place the following elements in order of increasing electronegativity. Sr $\quad$ N $\quad$ Na

Correct Answer
verified
A

Correct Answer
verified

Using periodic trends,place the following bonds in order of increasing ionic character. Si-P $\quad$ Si-Cl $\quad$ Si-S

Correct Answer
verified

Using Lewis structures and formal charge,which of the following ions is most stable? OCN^- $\quad$ ONC^- $\quad$ NOC^-

Correct Answer
verified
A

Correct Answer
verified

Use the bond energies provided to estimate Δ_rH° for the reaction below. XeF₂₊2F₂ → XeF₆ Δ_rH°= ? Bond $\quad$ $\quad$ Bond Energy (kJ mol^-1) Xe-F $\quad$ $\quad$ $\quad$ $\quad$ 147 F-F $\quad$ $\quad$ $\quad$ $\quad$ 159

Correct Answer
verified