Question 1

The chemical formula for the chlorite ion is

Accepted Answer

A)   Cl-.
B)   Cl3-.
C)   ClO2-.
D)   ClO3-.E) A) and D)
F) All of the above

Question 2

Place the following in order of increasing magnitude of lattice energy. CaO MgO SrS

Accepted Answer

A)   MgO 
B)   SrS 
C)   SrS 
D)   CaO 
E)   CaO < SrS < MgOF) B) and E)
G) B) and C)

Question 3

Give the name for HNO3.

Accepted Answer

A)   nitric acid
B)   nitrous acid
C)   hydrogen nitrate
D)   hydrogen nitrite
E)   hydrogen nitrideF) A) and D)
G) None of the above

Question 4

Determine the empirical formula for a compound that contains C,H and O.It contains 52.14% C and 34.73% O by mass.

Accepted Answer

A)   C2H6O
B)   CHO
C)   C4H13O2
D)   CH4O3
E)   CH3OF) C) and D)
G) B) and D)

Question 5

Choose the compound below that should have the highest melting point according to the ionic bonding model.

Accepted Answer

A)   SrI2
B)   MgF2
C)   Ba Cl2
D)   SrF2
E)   Sr Cl2F) C) and D)
G) All of the above

Question 6

How many Fe(II) ions are there in 10.0 g of FeSO4?

Accepted Answer

A)   1.93 × 10-25 iron(II)  ions
B)   3.96 × 1022 iron(II)  ions
C)   9.15 × 1024 iron(II)  ions
D)   9.14 × 1026 iron(II)  ionsE) C) and D)
F) B) and C)

Question 7

What is the empirical formula for a compound that is composed of 53.91% carbon.35.91% oxygen,and 10.17% hydrogen?

Accepted Answer

A)   CHO
B)   C4H9O2
C)   C2H4O3
D)   CH2O2
E)   C3H6OF) A) and D)
G) A) and C)

Question 8

Which of the following is one possible form of pentane?

Accepted Answer

A)   CH3CH2CH2CH2CH3
B)   CH3CH=CHCH2CH3
C)   CH3CH2CH2CH2CH2CH3
D)   CH3CH2CH2CH2CH2NH2
E)   CH3CH2-O-CH2CH2CH3F) A) and E)
G) B) and D)

Question 9

The molecular weight of urea ((NH2) 2CO) ,a compound used as a nitrogen fertilizer,is ________ amu (rounded to one decimal place) .

Accepted Answer

A)   44.0
B)   43.0
C)   60.1
D)   8.0
E)   32.0F) B) and D)
G) None of the above

Question 10

How many C2H4 molecules are contained in 45.8 mg of C2H4? The molar mass of C2H4 is 28.05 g/mol.

Accepted Answer

A)   9.83 × 1020 C2H4 molecules
B)   7.74 × 1026 C2H4 molecules
C)   2.71 × 1020 C2H4 molecules
D)   3.69 × 1023 C2H4 molecules
E)   4.69 × 1023 C2H4 moleculesF) A) and E)
G) B) and C)

Question 11

How many molecules of butane are contained in 25.0 mL of butane? The density of butane is 0.6011 g/mL and the molar mass is 58.12 g/mol.

Accepted Answer

A)   2.59 × 1023 molecules butane
B)   1.46 × 1027 molecules butane
C)   6.87 × 1023 molecules butane
D)   1.56 × 1023 molecules butane
E)   7.14 × 1025 molecules butaneF) C) and D)
G) B) and E)

Question 12

How many sodium ions are contained in 99.6 mg of Na2SO3? The molar mass of Na2SO3 is 126.05 g/mol.

Accepted Answer

A)   1.52 × 1027 sodium ions
B)   4.76 × 1020 sodium ions
C)   2.10 × 1021 sodium ions
D)   1.05 × 1021 sodium ions
E)   9.52 × 1020 sodium ionsF) A) and B)
G) A) and C)

Question 13

Which of the following represent the Lewis structure for S2⁻?

Accepted Answer

A)   2⁻? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
B)   2⁻? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
C)   2⁻? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
D)   2⁻? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
E)   2⁻? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >F) C) and D)
G) B) and C)

Question 14

Choose the compound below that should have the highest melting point according to the ionic bonding model.

Accepted Answer

A)   AlN
B)   MgO
C)   Li F
D)   CaS
E)   Rb FF) B) and D)
G) A) and D)

Question 15

Write the formula for the compound formed between lithium and sulfur.

Accepted Answer

A)   LiS
B)   LiS2
C)   Li2S
D)   Li2SO3
E)   Li3S2F) A) and B)
G) None of the above

Question 16

Give the name for NaHSO3.

Accepted Answer

A)   monosodium sulfite
B)   monosodium sulfate
C)   sodium bisulfate
D)   sodium bisulfite
E)   sodium bisulfideF) None of the above
G) B) and C)

Question 17

Identify the substance that conducts electricity.

Accepted Answer

A)   NaCl dissolved in water
B)   solid NaCl
C)   ethanol
D)   solid baking soda
E)   sugar dissolved in water.F) B) and E)
G) A) and E)

Question 18

Use the data given below to construct a Born-Haber cycle to determine the heat of formation of KCl. DH°(kJ) 
K(s) → K(g) 89
K(g) → K⁺(g) + e⁻ 418
Cl2(g) → 2 Cl(g) 244
Cl(g) + e⁻ → Cl⁻(g) -349
KCl(s) → K⁺(g) + Cl⁻(g) 717

Accepted Answer

A)   -1119 kJ
B)   -997 kJ
C)   -437 kJ
D)   +631 kJ
E)   +158 kJF) All of the above
G) A) and E)

Question 19

Which of the following represent the Lewis structure for N?

Accepted Answer

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

Question 20

Describe the difference between ionic and molecular compounds.Give an example of each.

Accepted Answer

An ionic compound is formed between a me...

Exam 5: Molecules and Compounds

Give the name for NaHSO3.

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What is the empirical formula for a compound that is composed of 53.91% carbon.35.91% oxygen,and 10.17% hydrogen?

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The chemical formula for the chlorite ion is

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Which of the following is one possible form of pentane?

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How many sodium ions are contained in 99.6 mg of Na2SO3? The molar mass of Na2SO3 is 126.05 g/mol.

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Identify the substance that conducts electricity.

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Describe the difference between ionic and molecular compounds.Give an example of each.

Correct AnswerverifiedAn ionic compound is formed between a me...View AnswerShow Answer

Determine the empirical formula for a compound that contains C,H and O.It contains 52.14% C and 34.73% O by mass.

Correct AnswerverifiedShow Answer

Use the data given below to construct a Born-Haber cycle to determine the heat of formation of KCl. DH°(kJ) K(s) → K(g) 89 K(g) → K⁺(g) + e⁻ 418 Cl2(g) → 2 Cl(g) 244 Cl(g) + e⁻ → Cl⁻(g) -349 KCl(s) → K⁺(g) + Cl⁻(g) 717

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Give the name for HNO3.

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How many molecules of butane are contained in 25.0 mL of butane? The density of butane is 0.6011 g/mL and the molar mass is 58.12 g/mol.

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Which of the following represent the Lewis structure for S2⁻?

Correct AnswerverifiedShow Answer

Place the following in order of increasing magnitude of lattice energy. CaO MgO SrS

Correct AnswerverifiedShow Answer

Choose the compound below that should have the highest melting point according to the ionic bonding model.

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Choose the compound below that should have the highest melting point according to the ionic bonding model.

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Which of the following represent the Lewis structure for N?

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The molecular weight of urea ((NH2) 2CO) ,a compound used as a nitrogen fertilizer,is ________ amu (rounded to one decimal place) .

Correct AnswerverifiedShow Answer

How many Fe(II) ions are there in 10.0 g of FeSO4?

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How many C2H4 molecules are contained in 45.8 mg of C2H4? The molar mass of C2H4 is 28.05 g/mol.

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Write the formula for the compound formed between lithium and sulfur.

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Give the name for NaHSO₃.

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How many sodium ions are contained in 99.6 mg of Na₂SO₃? The molar mass of Na₂SO₃is 126.05 g/mol.

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An ionic compound is formed between a me...
View Answer

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Use the data given below to construct a Born-Haber cycle to determine the heat of formation of KCl. DH°(kJ) K(s) → K(g) 89 K(g) → K⁺(g) + e⁻ 418 Cl₂(g) → 2 Cl(g) 244 Cl(g) + e⁻ → Cl⁻(g) -349 KCl(s) → K⁺(g) + Cl⁻(g) 717

Correct Answer
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Give the name for HNO₃.

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Which of the following represent the Lewis structure for S²⁻?

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The molecular weight of urea ((NH₂) ₂CO) ,a compound used as a nitrogen fertilizer,is ________ amu (rounded to one decimal place) .

Correct Answer
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How many Fe(II) ions are there in 10.0 g of FeSO₄?

Correct Answer
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How many C₂H₄ molecules are contained in 45.8 mg of C₂H₄? The molar mass of C₂H₄ is 28.05 g/mol.

Correct Answer
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