Question 1

The ammonium ion has the formula NH4+. How many electrons must be shown in the Lewis structure of the ammonium ion?

Accepted Answer

A)  4 
B)  5 
C)  8 
D)  9 
A)  4 
B)  5 
C)  8 
D)  9

Question 2

Which of the following molecules is best described as having a nearly tetrahedral distribution of electron density?

Accepted Answer

A)  BeCl2 
B)  OF2 
C)  SnCl2 
D)  none of these 
A)  BeCl2 
B)  OF2 
C)  SnCl2 
D)  none of these

Question 3

The following represents carbonic acid, an important part of the buffer system in blood.  
-How many polar bonds are represented in this structure?

Accepted Answer

A)  5 
B)  3 
C)  2 
D)  None of the bonds are polar. 
A)  5 
B)  3 
C)  2 
D)  None of the bonds are polar.

Question 4

How many electrons are associated with a triple bond?

Accepted Answer

A)  2 
B)  3 
C)  4 
D)  6 
A)  2 
B)  3 
C)  4 
D)  6

Question 5

The chemical formula of rust is Fe2O3. Which of the following is the correct common name for this compound?

Accepted Answer

A)  iron oxide 
B)  ferric oxide 
C)  ferrous oxide 
D)  diiron trioxide 
A)  iron oxide 
B)  ferric oxide 
C)  ferrous oxide 
D)  diiron trioxide

Question 6

When we name a molecular binary compound which of the following is true?

Accepted Answer

A)  The element which has more atoms in the molecule is named first. 
B)  We name the elements in alphabetical order. 
C)  We name the less electronegative element first. 
D)  We name the more electronegative element first. 
A)  The element which has more atoms in the molecule is named first. 
B)  We name the elements in alphabetical order. 
C)  We name the less electronegative element first. 
D)  We name the more electronegative element first.

Question 7

High electronegativities are associated with which type of elements?

Accepted Answer

A)  metals 
B)  metalloids 
C)  noble gases 
D)  nonmetals 
A)  metals 
B)  metalloids 
C)  noble gases 
D)  nonmetals

Question 8

What bond angle is most closely associated with a linear distribution of electron density?

Accepted Answer

A)  90° 
B)  109.5° 
C)  120° 
D)  180° 
A)  90° 
B)  109.5° 
C)  120° 
D)  180°

Question 9

What is the formula of the compound formed between the ammonium ion and the carbonate ion?

Accepted Answer

A)  NH4CO3 
B)  NH4(CO3)2 
C)  (NH4)2CO3 
D)  (NH4)3CO3 
A)  NH4CO3 
B)  NH4(CO3)2 
C)  (NH4)2CO3 
D)  (NH4)3CO3

Question 10

If the name of an ion ends in "ate" what type of ion is it most likely to be?

Accepted Answer

A)  a monatomic anion 
B)  a monatomic cation 
C)  a polyatomic anion 
D)  a polyatomic cation 
A)  a monatomic anion 
B)  a monatomic cation 
C)  a polyatomic anion 
D)  a polyatomic cation

Question 11

What is the correct common name for the compound with the formula CuCl2?

Accepted Answer

A)  copper chloride 
B)  copper chlorine 
C)  cupric chloride 
D)  cuprous chloride 
A)  copper chloride 
B)  copper chlorine 
C)  cupric chloride 
D)  cuprous chloride

Question 12

Which Greek letter is used in denoting the spatial distribution of charge in a polar bond?

Accepted Answer

A)  alpha, α 
B)  beta, β 
C)  gamma, γ 
D)  delta, δ 
A)  alpha, α 
B)  beta, β 
C)  gamma, γ 
D)  delta, δ

Question 13

Which of the following is true in the carbonate ion, CO32-?

Accepted Answer

A)  The carbon atom does not have an octet. 
B)  The ion has 22 valence electrons. 
C)  The electrons are constantly moving from one bond location to another. 
D)  None of the above is true. 
A)  The carbon atom does not have an octet. 
B)  The ion has 22 valence electrons. 
C)  The electrons are constantly moving from one bond location to another. 
D)  None of the above is true.

Question 14

In a Lewis structure, which of the following atoms can have more than eight electrons associated with it?

Accepted Answer

A)  C 
B)  N 
C)  O 
D)  none of these 
A)  C 
B)  N 
C)  O 
D)  none of these

Question 15

A student discussing bond polarity and molecular polarity in alcohols made the following statements: ​
(i) In methanol, CH3OH, the H-O bond is more polar than the C-O bond.
(ii) Ethanol, CH3CH2OH, the alcohol of alcoholic beverages, has at least one polar bond, a net dipole, and is a polar molecule.
​
Which of the above statements is(are) true?

Accepted Answer

A)  only statement (i) 
B)  only statement (ii) 
C)  both statement (i) and statement (ii) 
D)  neither statement (i) nor statement (ii) 
A)  only statement (i) 
B)  only statement (ii) 
C)  both statement (i) and statement (ii) 
D)  neither statement (i) nor statement (ii)

Question 16

The chemical formula of rust is Fe2O3. Which of the following is the correct systematic name for this compound?

Accepted Answer

A)  iron oxide 
B)  iron(II) oxide 
C)  iron(III) oxide 
D)  diiron trioxide 
A)  iron oxide 
B)  iron(II) oxide 
C)  iron(III) oxide 
D)  diiron trioxide

Question 17

What is the formula of the compound formed by calcium and fluorine?

Accepted Answer

A)  CaF 
B)  CaF2 
C)  CaF3 
D)  Ca2F 
A)  CaF 
B)  CaF2 
C)  CaF3 
D)  Ca2F

Question 18

What is the name of SCl2?

Accepted Answer

A)  sulfur chloride 
B)  sulfur chlorine 
C)  monosulfur chloride 
D)  sulfur dichloride 
A)  sulfur chloride 
B)  sulfur chlorine 
C)  monosulfur chloride 
D)  sulfur dichloride

Question 19

The following represents carbonic acid, an important part of the buffer system in blood.  
-How many nonbonding electrons are present in this structure?

Accepted Answer

A)  3 
B)  6 
C)  12 
D)  The are no nonbonding electrons. 
A)  3 
B)  6 
C)  12 
D)  The are no nonbonding electrons.

Question 20

For which of the following pairs are the atoms most likely to form an ionic bond with each other?

Accepted Answer

A)  carbon and oxygen 
B)  calcium and chlorine 
C)  chlorine and oxygen 
D)  sodium and magnesium 
A)  carbon and oxygen 
B)  calcium and chlorine 
C)  chlorine and oxygen 
D)  sodium and magnesium

Exam 3: Chemical Bonds

The ammonium ion has the formula NH4+. How many electrons must be shown in the Lewis structure of the ammonium ion?

Which of the following molecules is best described as having a nearly tetrahedral distribution of electron density?

The following represents carbonic acid, an important part of the buffer system in blood. -How many polar bonds are represented in this structure?

How many electrons are associated with a triple bond?

The chemical formula of rust is Fe2O3. Which of the following is the correct common name for this compound?

When we name a molecular binary compound which of the following is true?

High electronegativities are associated with which type of elements?

What bond angle is most closely associated with a linear distribution of electron density?

What is the formula of the compound formed between the ammonium ion and the carbonate ion?

If the name of an ion ends in "ate" what type of ion is it most likely to be?

What is the correct common name for the compound with the formula CuCl2?

Which Greek letter is used in denoting the spatial distribution of charge in a polar bond?

Which of the following is true in the carbonate ion, CO32-?

In a Lewis structure, which of the following atoms can have more than eight electrons associated with it?

The chemical formula of rust is Fe2O3. Which of the following is the correct systematic name for this compound?

What is the formula of the compound formed by calcium and fluorine?

What is the name of SCl2?

The following represents carbonic acid, an important part of the buffer system in blood. -How many nonbonding electrons are present in this structure?

For which of the following pairs are the atoms most likely to form an ionic bond with each other?

Matter, Energy, and Measurement

Atoms

Chemical Reactions

Gases, Liquids, and Solids

Solutions and Colloids

Reaction Rates and Chemical Equilibrium

Acids and Bases

Nuclear Chemistry

Organic Chemistry

Alkanes

Alkenes and Alkynes

Benzene and Its Derivatives

Alcohols, Ethers, and Thiols

Chirality: the Handedness of Molecules

Amines

Aldehydes and Ketones

Carboxylic Acids

Carboxylic Anhydrides, Esters, and Amides

Carbohydrates

Lipids

Proteins

Enzymes

Chemical Communications: Neurotransmitters and Hormones

Nucleotides, Nucleic Acids, and Heredity

Gene Expression and Protein Synthesis

Bioenergetics: How the Body Converts Food to Energy

Specific Catabolic Pathways: Carbohydrate, Lipid, and Protein Metabolism

Biosynthetic Pathways

Nutrition

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Body Fluids

Filters

The ammonium ion has the formula NH₄⁺. How many electrons must be shown in the Lewis structure of the ammonium ion?

The chemical formula of rust is Fe₂O₃. Which of the following is the correct common name for this compound?

What is the correct common name for the compound with the formula CuCl₂?

Which of the following is true in the carbonate ion, CO₃^2-?

The chemical formula of rust is Fe₂O₃. Which of the following is the correct systematic name for this compound?

What is the name of SCl₂?