Question 1

In the Lewis symbol for an atom of bromine,there are ______________ (how many?)dots around the Br.

Accepted Answer

The answer of In the Lewis symbol for an atom...

Question 2

The CO molecule would

Accepted Answer

A)  probably be nonpolar. 
B)  definitely be nonpolar. 
C)  definitely be polar. 
D)  probably be polar. 
A)  probably be nonpolar. 
B)  definitely be nonpolar. 
C)  definitely be polar. 
D)  probably be polar.

Question 3

A substance of unknown composition is heated in an open container.As a result,the mass of the container and its contents

Accepted Answer

A)  decreases. 
B)  remains the same. 
C)  increases. 
D)  Any of these could occur. 
A)  decreases. 
B)  remains the same. 
C)  increases. 
D)  Any of these could occur.

Question 4

The law of definite proportions states that different samples of a pure compound always contain the same elements in the same proportion by

Accepted Answer

A)  mass. 
B)  atoms. 
C)  atomic number. 
D)  volume. 
A)  mass. 
B)  atoms. 
C)  atomic number. 
D)  volume.

Question 5

When potassium and sulfur react to form potassium sulfide,an ionic compound,

Accepted Answer

A)  each sulfur atom loses two electrons. 
B)  each sulfur atom loses one electron. 
C)  each potassium atom loses one electron. 
D)  each potassium atom loses two electrons. 
A)  each sulfur atom loses two electrons. 
B)  each sulfur atom loses one electron. 
C)  each potassium atom loses one electron. 
D)  each potassium atom loses two electrons.

Question 6

Which of the following compounds contains both ionic and covalent bonds?

Accepted Answer

A)  CaSO4 
B)  CHCl3 
C)  HNO3 
D)  C12H22O11 
A)  CaSO4 
B)  CHCl3 
C)  HNO3 
D)  C12H22O11

Question 7

When forming ionic compounds,atoms ______________ electrons.

Accepted Answer

The answer of When forming ionic compounds,atoms ______________ electrons....

Question 8

How many covalent bonds would be formed by an atom of each of the following elements?
a. C
b. H
c. F
d. Ne

Accepted Answer

The answer of How many covalent bonds would be formed...

Question 9

The force responsible for chemical bonding is

Accepted Answer

A)  nuclear. 
B)  electromagnetic. 
C)  none of these. 
D)  gravitational. 
A)  nuclear. 
B)  electromagnetic. 
C)  none of these. 
D)  gravitational.

Question 10

Suppose 39 g of reactant A is mixed with 40 g of reactant B.After a chemical reaction takes place between A and B,which statement is correct?

Accepted Answer

A)  The total mass of products plus any unreacted reactants will be 79 g. 
B)  The total mass of products plus any unreacted reactants will be less than 79 g. 
C)  The total mass of products plus any unreacted reactants will be more than 79 g. 
D)  The total mass of products will be 79 g. 
A)  The total mass of products plus any unreacted reactants will be 79 g. 
B)  The total mass of products plus any unreacted reactants will be less than 79 g. 
C)  The total mass of products plus any unreacted reactants will be more than 79 g. 
D)  The total mass of products will be 79 g.

Question 11

What electric charge is characteristic for an ion of Cl?

Accepted Answer

A)  7+ 
B)  0 
C)  1- 
D)  1+ 
A)  7+ 
B)  0 
C)  1- 
D)  1+

Question 12

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 13

Ion-dipole interactions are responsible for

Accepted Answer

A)  the dissolving of salt in water. 
B)  ice being less dense than water. 
C)  the ease of electrolysis of water. 
D)  metallic bonding in steel. 
A)  the dissolving of salt in water. 
B)  ice being less dense than water. 
C)  the ease of electrolysis of water. 
D)  metallic bonding in steel.

Question 14

The preferred name of Cu2S is ______________.

Accepted Answer

Question 15

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 16

The Lewis symbol would be characteristic of which group   ?

Accepted Answer

A)  2A 
B)  4A 
C)  3A 
D)  1A 
A)  2A 
B)  4A 
C)  3A 
D)  1A

Question 17

A water molecule is

Accepted Answer

A)  angular and nonpolar. 
B)  linear and polar. 
C)  linear and nonpolar. 
D)  angular and polar. 
A)  angular and nonpolar. 
B)  linear and polar. 
C)  linear and nonpolar. 
D)  angular and polar.

Question 18

The ionic charge of the nitrite ion in Al(NO2)3,aluminum nitrite,must be

Accepted Answer

A)  3+. 
B)  1-. 
C)  3-. 
D)  1+. 
A)  3+. 
B)  1-. 
C)  3-. 
D)  1+.

Question 19

The ______________ of a compound is the sum of the atomic masses given in the formula of the compound.

Accepted Answer

The answer of The ______________ of a compound is the...

Question 20

The formula for ammonia is ______________.

Accepted Answer

The answer of The formula for ammonia is ______________....

Exam 12: Chemical Bonding

In the Lewis symbol for an atom of bromine,there are ______________ (how many?)dots around the Br.

The CO molecule would

A substance of unknown composition is heated in an open container.As a result,the mass of the container and its contents

The law of definite proportions states that different samples of a pure compound always contain the same elements in the same proportion by

When potassium and sulfur react to form potassium sulfide,an ionic compound,

Which of the following compounds contains both ionic and covalent bonds?

When forming ionic compounds,atoms ______________ electrons.

How many covalent bonds would be formed by an atom of each of the following elements? a. C b. H c. F d. Ne

The force responsible for chemical bonding is

Suppose 39 g of reactant A is mixed with 40 g of reactant B.After a chemical reaction takes place between A and B,which statement is correct?

What electric charge is characteristic for an ion of Cl?

Which of these compounds would be ionic?

Ion-dipole interactions are responsible for

The preferred name of Cu2S is ______________.

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

The Lewis symbol would be characteristic of which group ?

A water molecule is

The ionic charge of the nitrite ion in Al(NO2)3,aluminum nitrite,must be

The ______________ of a compound is the sum of the atomic masses given in the formula of the compound.

The formula for ammonia is ______________.

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The preferred name of Cu₂S is ______________.

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

The ionic charge of the nitrite ion in Al(NO₂)₃,aluminum nitrite,must be