Question 1

Identify the compound that has polar bonds,but a dipole moment of 0.

Accepted Answer

A)   CF4
B)   O2
C)   KF
D)   Ar
E)   ZnF) A) and B)
G) C) and E)

Question 2

Draw the best Lewis structure for CI3-1.What is the formal charge on the C?

Accepted Answer

A)   0
B)   +1
C)   -1
D)   -3
E)   -5F) A) and B)
G) A) and C)

Question 3

Identify the number of bonding pairs and lone pairs of electrons in water.

Accepted Answer

A)   1 bonding pair and 1 lone pair
B)   1 bonding pair and 2 lone pairs
C)   2 bonding pairs and 2 lone pairs
D)   2 bonding pairs and 1 lone pair
E)   3 bonding pairs and 2 lone pairsF) B) and E)
G) A) and D)

Question 4

Use the data given below to construct a Born-Haber cycle to determine the electron affinity of Br. DH°(kJ) 
K(s) → K(g) 89
K(g) → K⁺(g) + e⁻ 419
Br2(l) → 2 Br(g) 193
K(s) + 2(l) → 2 Br(g) 193 K(s) +   Br2(g) → KBr(s) -394 KBr(s) → K⁺(g) + Br⁻(g) 674 A)  -885 kJ B)  -325 kJ C)  +367 kJ D)  -464 kJ E)  +246 kJ" class="answers-bank-image d-inline" rel="preload" > Br2(g) → KBr(s) -394
KBr(s) → K⁺(g) + Br⁻(g) 674

Accepted Answer

A)   -885 kJ
B)   -325 kJ
C)   +367 kJ
D)   -464 kJ
E)   +246 kJF) B) and E)
G) A) and C)

Question 5

Give the complete electronic configuration for Ca2+.

Accepted Answer

A)   1s22s22p63s24p6
B)   1s22s22p63s23p6
C)   1s22s22p63s23p5
D)   1s22s23p64s25p6
E)   1s22s2p63s2p6F) B) and E)
G) A) and D)

Question 6

How many lone pairs of electrons are on the As atom in AsF3?

Accepted Answer

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

Question 7

Use the bond energies provided to estimate ΔH°rxn for the reaction below. PCl3(g) + Cl2(g) → PCl5(l) ΔH°rxn = ?
Bond Bond Energy (kJ/mol) 
Cl-Cl 243
P-Cl 331

Accepted Answer

A)   -243 kJ
B)   -419 kJ
C)   -662 kJ
D)   -67 kJ
E)   -905 kJF) None of the above
G) D) and E)

Question 8

Which of the following reactions is associated with the lattice energy of MgO (ΔH°latt) ?

Accepted Answer

A)   Mg(s)  + O(s)  → MgS(s) 
B)   MgS(s)  → Mg(s)  + O(s) 
C)   Mg2⁺(aq)  + O2⁻(aq)  → MgO(s) 
D)   Mg2⁺(g)  + O2⁻(g)  → MgO(s) 
E)   MgO(s)  → Mg2⁺(aq)  + O2⁻(aq) F) A) and E)
G) B) and C)

Question 9

How many lone pairs of electrons are on the Xe atom in XeF6 ?

Accepted Answer

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

Question 10

Identify the ionic compound that is used as an antacid.

Accepted Answer

A)   silver nitrate
B)   barium sulfate
C)   lithium carbonate
D)   sodium chloride
E)   sodium bicarbonateF) B) and D)
G) A) and B)

Question 11

How many electrons does an hydroxyl radical contain?

Accepted Answer

A)   7 electrons
B)   6 electrons
C)   8 electrons
D)   9 electrons
E)   5 electronsF) None of the above
G) All of the above

Question 12

Identify the bond with the lowest bond energy.

Accepted Answer

A)   Si=O
B)   N=N
C)   C=C
D)   C=N
E)   O=OF) B) and C)
G) A) and D)

Question 13

Place the following in order of decreasing magnitude of lattice energy. KF BaO RbI

Accepted Answer

A)   RbI > KF > BaO
B)   RbI > BaO > KF
C)   BaO > RbI > KF
D)   KF > RbI > BaO
E)   BaO > KF > RbIF) A) and B)
G) None of the above

Question 14

Draw the Lewis Dot structure for Al3+.

Accepted Answer

The Al should have n...

Question 15

Choose the bond below that is least polar.

Accepted Answer

A)   P-Cl
B)   C-Cl
C)   C-P
D)   C-I
E)   C-TeF) B) and D)
G) B) and C)

Question 16

Which of the following elements can form compounds with an expanded octet?

Accepted Answer

A)   C
B)   Br
C)   F
D)   Be
E)   None of the above can form compounds with an expanded octet.F) A) and D)
G) D) and E)

Question 17

A single covalent bond contains

Accepted Answer

A)   0 pairs of neutrons.
B)   1 pair of electrons.
C)   2 pairs of electrons.
D)   1 pair of protons.
E)   4 pairs of protons.F) B) and D)
G) A) and C)

Question 18

Which of the following ionic compounds would be expected to have the highest lattice energy?

Accepted Answer

A)   Li Br
B)   Na Br
C)   K Br
D)   Rb BrE) All of the above
F) C) and D)

Question 19

Of the following elements,which has the lowest electronegativity?

Accepted Answer

A)   O
B)   P
C)   Na
D)   Nb
E)   WF) D) and E)
G) All of the above

Question 20

Choose the best Lewis structure for SF4.

Accepted Answer

A)  4. 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
B)  4. 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
C)  4. 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
D)  4. 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
E)  4. 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >F) B) and E)
G) C) and D)

Exam 9: Chemical Bonding I: Lewis Theory

Which of the following ionic compounds would be expected to have the highest lattice energy?

Correct AnswerverifiedShow Answer

A single covalent bond contains

Correct AnswerverifiedShow Answer

How many lone pairs of electrons are on the Xe atom in XeF6 ?

Correct AnswerverifiedShow Answer

Give the complete electronic configuration for Ca2+.

Correct AnswerverifiedShow Answer

Choose the best Lewis structure for SF4.

Correct AnswerverifiedShow Answer

Identify the ionic compound that is used as an antacid.

Correct AnswerverifiedShow Answer

Which of the following reactions is associated with the lattice energy of MgO (ΔH°latt) ?

Correct AnswerverifiedShow Answer

Identify the bond with the lowest bond energy.

Correct AnswerverifiedShow Answer

Use the bond energies provided to estimate ΔH°rxn for the reaction below. PCl3(g) + Cl2(g) → PCl5(l) ΔH°rxn = ? Bond Bond Energy (kJ/mol) Cl-Cl 243 P-Cl 331

Correct AnswerverifiedShow Answer

Identify the compound that has polar bonds,but a dipole moment of 0.

Correct AnswerverifiedShow Answer

Choose the bond below that is least polar.

Correct AnswerverifiedShow Answer

Of the following elements,which has the lowest electronegativity?

Correct AnswerverifiedShow Answer

Identify the number of bonding pairs and lone pairs of electrons in water.

Correct AnswerverifiedShow Answer

How many lone pairs of electrons are on the As atom in AsF3?

Correct AnswerverifiedShow Answer

Which of the following elements can form compounds with an expanded octet?

Correct AnswerverifiedShow Answer

Draw the best Lewis structure for CI3-1.What is the formal charge on the C?

Correct AnswerverifiedShow Answer

Draw the Lewis Dot structure for Al3+.

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

How many electrons does an hydroxyl radical contain?

Correct AnswerverifiedShow Answer

Use the data given below to construct a Born-Haber cycle to determine the electron affinity of Br. DH°(kJ) K(s) → K(g) 89 K(g) → K⁺(g) + e⁻ 419 Br2(l) → 2 Br(g) 193 K(s) + Br2(g) → KBr(s) -394 KBr(s) → K⁺(g) + Br⁻(g) 674

Correct AnswerverifiedShow Answer

Place the following in order of decreasing magnitude of lattice energy. KF BaO RbI

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

How many lone pairs of electrons are on the Xe atom in XeF₆?

Correct Answer
verified

Give the complete electronic configuration for Ca²⁺.

Correct Answer
verified

Choose the best Lewis structure for SF₄.

Correct Answer
verified

Correct Answer
verified

Which of the following reactions is associated with the lattice energy of MgO (ΔH°_latt) ?

Correct Answer
verified

Correct Answer
verified

Use the bond energies provided to estimate ΔH°_rxn for the reaction below. PCl₃(g) + Cl₂(g) → PCl₅(l) ΔH°_rxn= ? Bond Bond Energy (kJ/mol) Cl-Cl 243 P-Cl 331

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

How many lone pairs of electrons are on the As atom in AsF₃?

Correct Answer
verified

Correct Answer
verified

Draw the best Lewis structure for CI₃^-1.What is the formal charge on the C?

Correct Answer
verified

Draw the Lewis Dot structure for Al³⁺.

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

Correct Answer
verified

Use the data given below to construct a Born-Haber cycle to determine the electron affinity of Br. DH°(kJ) K(s) → K(g) 89 K(g) → K⁺(g) + e⁻ 419 Br₂(l) → 2 Br(g) 193 K(s) + Br₂(g) → KBr(s) -394 KBr(s) → K⁺(g) + Br⁻(g) 674

Correct Answer
verified

Correct Answer
verified