Question 1

The percentage by mass of carbon in methane, CH4, is about

Accepted Answer

A)  25%. 
B)  75%. 
C)  80%. 
D)  20%. 
A)  25%. 
B)  75%. 
C)  80%. 
D)  20%.

Question 2

Which of these compounds would be ionic?

Accepted Answer

A)  NO2 
B)  CCl4 
C)  LiF 
D)  H2S 
A)  NO2 
B)  CCl4 
C)  LiF 
D)  H2S

Question 3

The formula mass of sulfuric acid, H2SO4, is

Accepted Answer

A)  98 u. 
B)  100 u. 
C)  66 u. 
D)  7 u. 
A)  98 u. 
B)  100 u. 
C)  66 u. 
D)  7 u.

Question 4

______________ is the measure of the ability of an atom to attract shared electrons to itself.

Accepted Answer

The answer of ______________ is the measure of the ability...

Question 5

In which of the following compounds would hydrogen bonding not be expected among the molecules?

Accepted Answer

A)  NH3 
B)  CH4 
C)  H2O 
D)  HF 
A)  NH3 
B)  CH4 
C)  H2O 
D)  HF

Question 6

Water has unusual physical properties, as compared with H2S, H2Se, and H2Te, because of ______________ bonding.

Accepted Answer

Question 7

What electric charge is characteristic for an ion of O?

Accepted Answer

A)  6+ 
B)  0 
C)  2- 
D)  2+ 
A)  6+ 
B)  0 
C)  2- 
D)  2+

Question 8

If two atoms have equal electronegativity, a bond formed between them is generally

Accepted Answer

A)  ionic. 
B)  nonpolar. 
C)  very weak. 
D)  polar. 
A)  ionic. 
B)  nonpolar. 
C)  very weak. 
D)  polar.

Question 9

The concept that atoms tend to get eight electrons in their outer shell when forming molecules or ions is called the ______________.

Accepted Answer

The answer of The concept that atoms tend to get...

Question 10

The formula mass of calcium hydroxide, Ca(OH)2, is

Accepted Answer

A)  74.1 u. 
B)  38.1 u. 
C)  57.1 u. 
D)  58.1 u. 
A)  74.1 u. 
B)  38.1 u. 
C)  57.1 u. 
D)  58.1 u.

Question 11

Which of the following ions is isoelectronic with an argon atom?

Accepted Answer

A)  Cl- 
B)  Na+ 
C)  F- 
D)  S2+ 
A)  Cl- 
B)  Na+ 
C)  F- 
D)  S2+

Question 12

Which gas gives the characteristic odor to smelling salts and some household cleaners?

Accepted Answer

A)  Ammonia 
B)  Carbon dioxide 
C)  Chlorine 
D)  Ozone 
A)  Ammonia 
B)  Carbon dioxide 
C)  Chlorine 
D)  Ozone

Question 13

Compounds formed when the atoms involved share electrons are

Accepted Answer

A)  electrovalent. 
B)  covalent. 
C)  ionic. 
D)  organic. 
A)  electrovalent. 
B)  covalent. 
C)  ionic. 
D)  organic.

Question 14

In the HCl molecule, the bonding electrons spend

Accepted Answer

A)  equal time around both atoms. 
B)  all their time around only one of the atoms. 
C)  more time around the H atom. 
D)  more time around the Cl atom. 
A)  equal time around both atoms. 
B)  all their time around only one of the atoms. 
C)  more time around the H atom. 
D)  more time around the Cl atom.

Question 15

When atoms of two elements with a medium difference in electronegativity bond together, the bonding is probably

Accepted Answer

A)  ionic. 
B)  covalent. 
C)  polar covalent. 
D)  metallic. 
A)  ionic. 
B)  covalent. 
C)  polar covalent. 
D)  metallic.

Question 16

The statement "No detectable change in the total mass occurs during a chemical reaction" is known as the law of ______________.

Accepted Answer

conservati

Question 17

Which of the following elements commonly forms an ion with a 2+ charge?

Accepted Answer

A)  Li 
B)  Al 
C)  S 
D)  Ca 
A)  Li 
B)  Al 
C)  S 
D)  Ca

Question 18

A compound consists of only magnesium, carbon, and oxygen. If the percentage by mass of Mg is 28.8% and that of C is 14.2%, what is the percentage by mass of O?

Accepted Answer

A)  16.0% 
B)  57.0% 
C)  43.0% 
D)  22.5% 
E)  None of the above 
A)  16.0% 
B)  57.0% 
C)  43.0% 
D)  22.5% 
E)  None of the above

Question 19

The octet rule states that the formula for a compound is derived by

Accepted Answer

A)  using a minimum of 8 atoms. 
B)  using exactly 8 bonds in the formula unit. 
C)  having all atoms or ions get noble gas electron configurations. 
D)  having a net charge of magnitude 8. 
A)  using a minimum of 8 atoms. 
B)  using exactly 8 bonds in the formula unit. 
C)  having all atoms or ions get noble gas electron configurations. 
D)  having a net charge of magnitude 8.

Question 20

The Lewis symbol   would be characteristic of which group?

Accepted Answer

A)  6A 
B)  8A 
C)  3A 
D)  7A 
A)  6A 
B)  8A 
C)  3A 
D)  7A

Exam 12: Chemical Bonding

The percentage by mass of carbon in methane, CH4, is about

Which of these compounds would be ionic?

The formula mass of sulfuric acid, H2SO4, is

______________ is the measure of the ability of an atom to attract shared electrons to itself.

In which of the following compounds would hydrogen bonding not be expected among the molecules?

Water has unusual physical properties, as compared with H2S, H2Se, and H2Te, because of ______________ bonding.

What electric charge is characteristic for an ion of O?

If two atoms have equal electronegativity, a bond formed between them is generally

The concept that atoms tend to get eight electrons in their outer shell when forming molecules or ions is called the ______________.

The formula mass of calcium hydroxide, Ca(OH)2, is

Which of the following ions is isoelectronic with an argon atom?

Which gas gives the characteristic odor to smelling salts and some household cleaners?

Compounds formed when the atoms involved share electrons are

In the HCl molecule, the bonding electrons spend

When atoms of two elements with a medium difference in electronegativity bond together, the bonding is probably

The statement "No detectable change in the total mass occurs during a chemical reaction" is known as the law of ______________.

Which of the following elements commonly forms an ion with a 2+ charge?

A compound consists of only magnesium, carbon, and oxygen. If the percentage by mass of Mg is 28.8% and that of C is 14.2%, what is the percentage by mass of O?

The octet rule states that the formula for a compound is derived by

The Lewis symbol would be characteristic of which group?

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The percentage by mass of carbon in methane, CH₄, is about

The formula mass of sulfuric acid, H₂SO₄, is

Water has unusual physical properties, as compared with H₂S, H₂Se, and H₂Te, because of ______________ bonding.

The formula mass of calcium hydroxide, Ca(OH)₂, is