Question 1

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) B) and D)
F) C) and D)

Question 2

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) D) and E)
G) B) and E)

Question 3

Of the following elements,which has the lowest electronegativity?

Accepted Answer

A)   O
B)   P
C)   Na
D)   Nb
E)   WF) B) and C)
G) C) and D)

Question 4

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) B) and C)
G) A) and B)

Question 5

Draw the Lewis Dot structure for Al3+.

Accepted Answer

The Al should have n...

Question 6

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) A) and E)
G) C) and D)

Question 7

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) B) and E)

Question 8

Choose the best Lewis structure for SF4.

Accepted Answer

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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) All of the above
F) C) and D)

Question 10

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) C) and D)
G) A) and E)

Question 11

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

Accepted Answer

A)   0
B)   1
C)   2
D)   3E) B) and C)
F) None of the above

Question 12

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) A) and B)
G) None of the above

Question 13

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) A) and B)
G) A) and C)

Question 14

Give the complete electronic configuration for Ca2+.

Accepted Answer

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

Question 15

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) All of the above
G) B) and E)

Question 16

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) C) and E)
G) B) and C)

Question 17

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) All of the above
G) B) and C)

Question 18

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) None of the above
G) B) and D)

Question 19

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) C) and D)
G) B) and D)

Question 20

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) None of the above

Exam 9: Chemical Bonding I: Lewis Theory

Identify the ionic compound that is used as an antacid.

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

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Give the complete electronic configuration for Ca2+.

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Choose the best Lewis structure for SF4.

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Choose the bond below that is least polar.

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Of the following elements,which has the lowest electronegativity?

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

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How many electrons does an hydroxyl radical contain?

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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

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Identify the bond with the lowest bond energy.

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

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

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

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Draw the Lewis Dot structure for Al3+.

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

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

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

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

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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

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A single covalent bond contains

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

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Give the complete electronic configuration for Ca²⁺.

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Choose the best Lewis structure for SF₄.

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

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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

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

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Draw the Lewis Dot structure for Al³⁺.

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The Al should have n...
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How many lone pairs of electrons are on the Xe atom in XeF₆?

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

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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

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