Question 1

Write the name for CrS.

Accepted Answer

A)  chromous sulfate 
B)  chromous sulfide 
C)  chromic sulfide 
D)  chromic sulfate 
E)  chromium sulfide 
A)  chromous sulfate 
B)  chromous sulfide 
C)  chromic sulfide 
D)  chromic sulfate 
E)  chromium sulfide

Question 2

How many chloride ions are there in 3.00 mol of aluminum chloride?

Accepted Answer

A)  3.00 chloride ions 
B)  9.00 chloride ions 
C)  1.81 × 1024 chloride ions 
D)  5.42 × 1024 chloride ions 
A)  3.00 chloride ions 
B)  9.00 chloride ions 
C)  1.81 × 1024 chloride ions 
D)  5.42 × 1024 chloride ions

Question 3

Match between columns
                        Premises: calcium
neon
oxygen
iodine
hydrogen
chlorine

Accepted Answer

The Answer of Cl(g) and H(g) and Ne(g) and O(g) is...

Question 4

Describe a structural formula.

Accepted Answer

In a structural formula,lines

Question 5

Give the structure for sodium perchlorate.

Accepted Answer

A)  NaClO 
B)  NaClO2 
C)  NaClO3 
D)  NaClO4 
A)  NaClO 
B)  NaClO2 
C)  NaClO3 
D)  NaClO4

Question 6

Give the name for KMnO4.

Accepted Answer

A)  potassium manganese tetraoxide 
B)  potassium manganate 
C)  potassium permanganate 
D)  potassium permagnesium 
E)  potassium magnesate 
A)  potassium manganese tetraoxide 
B)  potassium manganate 
C)  potassium permanganate 
D)  potassium permagnesium 
E)  potassium magnesate

Question 7

What is the structure of the covalent compound formed by nitrogen and oxygen?
 Is this the only possibility?
 Explain.

Accepted Answer

Since nitrogen and oxygen are

Question 8

Write the name for FeS.

Accepted Answer

A)  iron (I) sulfate 
B)  iron (I) sulfide 
C)  iron (II) sulfide 
D)  iron (II) sulfate 
E)  iron sulfide 
A)  iron (I) sulfate 
B)  iron (I) sulfide 
C)  iron (II) sulfide 
D)  iron (II) sulfate 
E)  iron sulfide

Question 9

Methane and oxygen react to form carbon dioxide and water.What mass of water is formed if 6.4 g of methane reacts with 25.6 g of oxygen to produce 17.6 g of carbon dioxide?

Accepted Answer

A)  14.4 g 
B)  17.6 g 
C)  29.6 g 
D)  32.0 g 
A)  14.4 g 
B)  17.6 g 
C)  29.6 g 
D)  32.0 g

Question 10

What is the molar mass of pentane if 4.18 × 1016 molecules of pentane weigh 5.00 μg?

Accepted Answer

A)  72.0 g/mol 
B)  139 g/mol 
C)  288 g/mol 
D)  347 g/mol 
A)  72.0 g/mol 
B)  139 g/mol 
C)  288 g/mol 
D)  347 g/mol

Question 11

Use the data given below to construct a Born-Haber cycle to determine the bond energy of O2. DH°(kJ)
Na(s)→ Na(g)107
Na(g)→ Na⁺(g)+ e⁻ 496
O(g)+ e⁻ → O⁻(g)-141
O⁻(g)+ e⁻ → O2⁻(g)878
2 Na(s)+   O2(g)→ Na2O(s)-416
2 Na⁺(g)+ O2⁻(g)→ Na2O(s)-2608

Accepted Answer

A)  426 kJ 
B)  249 kJ 
C)  852 kJ 
D)  498 kJ 
E)  356 kJ 
A)  426 kJ 
B)  249 kJ 
C)  852 kJ 
D)  498 kJ 
E)  356 kJ

Question 12

Identify the compound with metallic bonding.

Accepted Answer

A)  Na I 
B)  K 
C)  H2O 
D)  He 
E)  S 
A)  Na I 
B)  K 
C)  H2O 
D)  He 
E)  S

Question 13

In which set do all elements tend to form anions in binary ionic compounds?

Accepted Answer

A)  Rb, Sn, S 
B)  Ba, Cu, Sn 
C)  P, As, Sb 
D)  Se, F, Cl 
A)  Rb, Sn, S 
B)  Ba, Cu, Sn 
C)  P, As, Sb 
D)  Se, F, Cl

Question 14

Which of the following represent the Lewis structure for Mg?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 15

Identify an ether.

Accepted Answer

A)  CH3CH2OCH2CH3 
B)  CH3CH2Br 
C)  CH3CH2NH2 
D)  CH3CH2CH2CH3 
E)  CH3COOH 
A)  CH3CH2OCH2CH3 
B)  CH3CH2Br 
C)  CH3CH2NH2 
D)  CH3CH2CH2CH3 
E)  CH3COOH

Question 16

How many molecules of N2O4 are in 76.3 g N2O4? The molar mass of N2O4 is 92.02 g/mol.

Accepted Answer

A)  5.54 × 1025 N2O4 molecules 
B)  7.26 × 1023 N2O4 molecules 
C)  1.38 × 1024 N2O4 molecules 
D)  4.59 × 1025 N2O4 molecules 
E)  4.99 × 1023 N2O4 molecules 
A)  5.54 × 1025 N2O4 molecules 
B)  7.26 × 1023 N2O4 molecules 
C)  1.38 × 1024 N2O4 molecules 
D)  4.59 × 1025 N2O4 molecules 
E)  4.99 × 1023 N2O4 molecules

Question 17

Use Lewis theory to determine the chemical formula for the compound formed between Al and F.

Accepted Answer

A)  Al3F2 
B)  Al2F3 
C)  Al F2 
D)  Al F 
E)  Al F3 
A)  Al3F2 
B)  Al2F3 
C)  Al F2 
D)  Al F 
E)  Al F3

Question 18

The chemical formula for cesium peroxide is

Accepted Answer

A)  CsOH. 
B)  CsO2. 
C)  Cs2O. 
D)  Cs2O2. 
A)  CsOH. 
B)  CsO2. 
C)  Cs2O. 
D)  Cs2O2.

Question 19

Draw the Lewis Dot structure for Al3+.

Accepted Answer

The Al should have n

Question 20

What is the mass of 6.78 × 1024 molecules of SO2? The molar mass of SO2 is 64.06 g/mol.

Accepted Answer

A)  205 g 
B)  294 g 
C)  721 g 
D)  341 g 
E)  685 g 
A)  205 g 
B)  294 g 
C)  721 g 
D)  341 g 
E)  685 g

Exam 5: Molecules and Compounds

Write the name for CrS.

How many chloride ions are there in 3.00 mol of aluminum chloride?

Describe a structural formula.

Give the structure for sodium perchlorate.

Give the name for KMnO4.

What is the structure of the covalent compound formed by nitrogen and oxygen? Is this the only possibility? Explain.

Write the name for FeS.

Methane and oxygen react to form carbon dioxide and water.What mass of water is formed if 6.4 g of methane reacts with 25.6 g of oxygen to produce 17.6 g of carbon dioxide?

What is the molar mass of pentane if 4.18 × 1016 molecules of pentane weigh 5.00 μg?

Use the data given below to construct a Born-Haber cycle to determine the bond energy of O2. DH°(kJ) Na(s)→ Na(g)107 Na(g)→ Na⁺(g)+ e⁻ 496 O(g)+ e⁻ → O⁻(g)-141 O⁻(g)+ e⁻ → O2⁻(g)878 2 Na(s)+ O2(g)→ Na2O(s)-416 2 Na⁺(g)+ O2⁻(g)→ Na2O(s)-2608

Identify the compound with metallic bonding.

In which set do all elements tend to form anions in binary ionic compounds?

Which of the following represent the Lewis structure for Mg?

Identify an ether.

How many molecules of N2O4 are in 76.3 g N2O4? The molar mass of N2O4 is 92.02 g/mol.

Use Lewis theory to determine the chemical formula for the compound formed between Al and F.

The chemical formula for cesium peroxide is

Draw the Lewis Dot structure for Al3+.

What is the mass of 6.78 × 1024 molecules of SO2? The molar mass of SO2 is 64.06 g/mol.

Essentials: Units, Measurements, and Problem Solving

Atoms

The Quantum Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I

Chemical Bonding Ii

Chemical Reactions and Chemical Quantities

Introduction to Solutions and Aqueous Reactions

Thermochemistry

Gases

Liquids, Solids, and Intermolecular Forces

Crystalline Solids and Modern Materials

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry

Transition Metals and Coordination Compounds

Filters

Give the name for KMnO₄.

What is the molar mass of pentane if 4.18 × 10¹⁶ molecules of pentane weigh 5.00 μg?

Use the data given below to construct a Born-Haber cycle to determine the bond energy of O₂. DH°(kJ) Na(s)→ Na(g)107 Na(g)→ Na⁺(g)+ e⁻ 496 O(g)+ e⁻ → O⁻(g)-141 O⁻(g)+ e⁻ → O²⁻(g)878 2 Na(s)+ O₂(g)→ Na₂O(s)-416 2 Na⁺(g)+ O²⁻(g)→ Na₂O(s)-2608

How many molecules of N₂O₄ are in 76.3 g N₂O₄? The molar mass of N₂O₄ is 92.02 g/mol.

Draw the Lewis Dot structure for Al³⁺.

What is the mass of 6.78 × 10²⁴ molecules of SO₂? The molar mass of SO₂ is 64.06 g/mol.