Question 1

How does soap work?

Accepted Answer

A) Soap works by breaking grease molecules into smaller molecules that dissolve in water. 
B) Soap works by making water into a nonpolar liquid which grease can dissolve in. 
C) Soap works by having a polar end and a nonpolar end which allows the water and oil to interact indirectly. 
D) Soap works by having a polar end which attaches to the grease molecule and polarizes it and turns the grease molecule into another soap molecule.This is a chain reaction. 
E) none of the above 
A) Soap works by breaking grease molecules into smaller molecules that dissolve in water. 
B) Soap works by making water into a nonpolar liquid which grease can dissolve in. 
C) Soap works by having a polar end and a nonpolar end which allows the water and oil to interact indirectly. 
D) Soap works by having a polar end which attaches to the grease molecule and polarizes it and turns the grease molecule into another soap molecule.This is a chain reaction. 
E) none of the above

Question 2

The correct Lewis structure for CO2 shows that the carbon atom has two sets of lone pair electrons.

Accepted Answer

A) True 
 B)False

Question 3

Drugs to fight HIV have been developed using bonding theory models.

Accepted Answer

A) True 
 B)False

Question 4

Which of the following statements about the water molecule is TRUE?

Accepted Answer

A) A water molecule has two dipole moments and they cancel each other. 
B) A water molecule is symmetrical and therefore is nonpolar. 
C) A water molecule is asymmetric and therefore is polar. 
D) The electronegativities of hydrogen and oxygen are equal and therefore a water molecule is nonpolar. 
E) none of the above 
A) A water molecule has two dipole moments and they cancel each other. 
B) A water molecule is symmetrical and therefore is nonpolar. 
C) A water molecule is asymmetric and therefore is polar. 
D) The electronegativities of hydrogen and oxygen are equal and therefore a water molecule is nonpolar. 
E) none of the above

Question 5

The VSEPR theory predicts that the angle between the central carbon atom and the two oxygen atoms in CO2 measures 180°.

Accepted Answer

A) True 
 B)False

Question 6

Which set shows the correct resonance structures for SeO2?

Accepted Answer

A) :   -   -   : ↔   =   =   
B) :   =   -   : ↔ :   -   =   : 
C) :   =Se=   ↔ : O≡ Se-   :↔ :   -Se≡ O : 
D)    =   -   : ↔ :   -   =   
E) SeO2 does not have a resonance structure. 
A) :   -   -   : ↔   =   =   
B) :   =   -   : ↔ :   -   =   : 
C) :   =Se=   ↔ : O≡ Se-   :↔ :   -Se≡ O : 
D)    =   -   : ↔ :   -   =   
E) SeO2 does not have a resonance structure.

Question 7

A chemical bond is classified as a covalent bond if it involves the transfer of electrons.

Accepted Answer

A) True 
 B)False

Question 8

What is the correct Lewis structure for Br2?

Accepted Answer

A) Br-Br 
B) :   -   : 
C)    =   
D) : Br≡ Br : 
E) none of the above 
A) Br-Br 
B) :   -   : 
C)    =   
D) : Br≡ Br : 
E) none of the above

Question 9

Water and oil do not mix because water molecules are nonpolar and molecules that compose oil are generally polar.

Accepted Answer

A) True 
 B)False

Question 10

When calculating the number of electrons for the Lewis structure of a polyatomic ion,subtract one electron for each negative charge.

Accepted Answer

A) True 
 B)False

Question 11

Which of the following compounds have resonance structures?

Accepted Answer

A) CH4 
B) H2O 
C) NH3 
D) O3 
E) None of the compounds have resonance structures. 
A) CH4 
B) H2O 
C) NH3 
D) O3 
E) None of the compounds have resonance structures.

Question 12

The Lewis model predicts that the formula of a compound formed between bromine and aluminum is:

Accepted Answer

A) AlBr 
B) Al2Br 
C) AlBr3 
D) AlBr2 
E) none of the above 
A) AlBr 
B) Al2Br 
C) AlBr3 
D) AlBr2 
E) none of the above

Question 13

What is the correct Lewis structure for N2?

Accepted Answer

A) N-N 
B) :   -   : 
C)    =   
D) : N ≡ N : 
E) none of the above 
A) N-N 
B) :   -   : 
C)    =   
D) : N ≡ N : 
E) none of the above

Question 14

The correct Lewis structure for potassium in KCl is K+.

Accepted Answer

A) True 
 B)False

Question 15

The electronegativity value for Mg is 1.2 and the value for O is 3.5.Based on these values,what type of bond is expected for a compound formed between Mg and O?

Accepted Answer

A) ionic 
B) pure covalent 
C) polar covalent 
D) not enough information 
E) none of the above 
A) ionic 
B) pure covalent 
C) polar covalent 
D) not enough information 
E) none of the above

Question 16

What is the molecular geometry of ozone,O3?

Accepted Answer

A) bent 
B) linear 
C) tetrahedral 
D) trigonal pyramidal 
E) not enough information 
A) bent 
B) linear 
C) tetrahedral 
D) trigonal pyramidal 
E) not enough information

Question 17

Which Lewis structure below correctly represents the compound formed between magnesium and sulfur?

Accepted Answer

A) Mg⁺ [:   :]⁻ 
B) Mg⁺ [:   :]⁻2 Mg⁺ 
C) [:   :]⁻ Mg⁺2 [:   :]⁻ 
D) Mg⁺2 [:   :]⁻2 
E) none of the above 
A) Mg⁺ [:   :]⁻ 
B) Mg⁺ [:   :]⁻2 Mg⁺ 
C) [:   :]⁻ Mg⁺2 [:   :]⁻ 
D) Mg⁺2 [:   :]⁻2 
E) none of the above

Question 18

What is the angle between electron groups in the trigonal planar electron geometry?

Accepted Answer

A) 90° 
B) 109.5° 
C) 120° 
D) 180° 
E) not enough information 
A) 90° 
B) 109.5° 
C) 120° 
D) 180° 
E) not enough information

Question 19

The total number of electrons to be counted for the Lewis structure of the PO43- polyatomic ion is:

Accepted Answer

A) 8. 
B) 26. 
C) 29. 
D) 32. 
E) none of the above 
A) 8. 
B) 26. 
C) 29. 
D) 32. 
E) none of the above

Question 20

The ammonium ion contains 10 valence electrons.

Accepted Answer

A) True 
 B)False

How does soap work?

The correct Lewis structure for CO₂ shows that the carbon atom has two sets of lone pair electrons.

Drugs to fight HIV have been developed using bonding theory models.

Which of the following statements about the water molecule is TRUE?

The VSEPR theory predicts that the angle between the central carbon atom and the two oxygen atoms in CO₂ measures 180°.

Which set shows the correct resonance structures for SeO₂?

A chemical bond is classified as a covalent bond if it involves the transfer of electrons.

What is the correct Lewis structure for Br₂?

Water and oil do not mix because water molecules are nonpolar and molecules that compose oil are generally polar.

When calculating the number of electrons for the Lewis structure of a polyatomic ion,subtract one electron for each negative charge.

Which of the following compounds have resonance structures?

The Lewis model predicts that the formula of a compound formed between bromine and aluminum is:

What is the correct Lewis structure for N₂?

The correct Lewis structure for potassium in KCl is K⁺.

The electronegativity value for Mg is 1.2 and the value for O is 3.5.Based on these values,what type of bond is expected for a compound formed between Mg and O?

What is the molecular geometry of ozone,O₃?

Which Lewis structure below correctly represents the compound formed between magnesium and sulfur?

What is the angle between electron groups in the trigonal planar electron geometry?

The total number of electrons to be counted for the Lewis structure of the PO₄^3- polyatomic ion is:

The ammonium ion contains 10 valence electrons.

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Exam 10: Chemical Bonding

How does soap work?

The correct Lewis structure for CO2 shows that the carbon atom has two sets of lone pair electrons.

Drugs to fight HIV have been developed using bonding theory models.

Which of the following statements about the water molecule is TRUE?

The VSEPR theory predicts that the angle between the central carbon atom and the two oxygen atoms in CO2 measures 180°.

Which set shows the correct resonance structures for SeO2?

A chemical bond is classified as a covalent bond if it involves the transfer of electrons.

What is the correct Lewis structure for Br2?

Water and oil do not mix because water molecules are nonpolar and molecules that compose oil are generally polar.

When calculating the number of electrons for the Lewis structure of a polyatomic ion,subtract one electron for each negative charge.

Which of the following compounds have resonance structures?

The Lewis model predicts that the formula of a compound formed between bromine and aluminum is:

What is the correct Lewis structure for N2?

The correct Lewis structure for potassium in KCl is K+.

The electronegativity value for Mg is 1.2 and the value for O is 3.5.Based on these values,what type of bond is expected for a compound formed between Mg and O?

What is the molecular geometry of ozone,O3?

Which Lewis structure below correctly represents the compound formed between magnesium and sulfur?

What is the angle between electron groups in the trigonal planar electron geometry?

The total number of electrons to be counted for the Lewis structure of the PO43- polyatomic ion is:

The ammonium ion contains 10 valence electrons.

The Chemical World

Measurement and Problem Solving

Matter and Energy

Atoms and Elements

Molecules and Compounds

Chemical Composition

Chemical Reactions

Quantities in Chemical Reactions

Electrons in Atoms and the Periodic Table

Gases

Liquids, solids, and Intermolecular Forces

Solutions

Acids and Bases

Chemical Equilibrium

Oxidation and Reduction

Radioactivity and Nuclear Chemistry

Organic Chemistry

Biochemistry

Filters

The correct Lewis structure for CO₂ shows that the carbon atom has two sets of lone pair electrons.

The VSEPR theory predicts that the angle between the central carbon atom and the two oxygen atoms in CO₂ measures 180°.

Which set shows the correct resonance structures for SeO₂?

What is the correct Lewis structure for Br₂?

What is the correct Lewis structure for N₂?

The correct Lewis structure for potassium in KCl is K⁺.

What is the molecular geometry of ozone,O₃?

The total number of electrons to be counted for the Lewis structure of the PO₄^3- polyatomic ion is: