Question 1

The correct name for HNO3 is hydronitric acid.

Accepted Answer

A) True 
 B)False  False

Question 2

The first chemist to formally state the law of constant composition was:

Accepted Answer

A)  Dalton.
B)  Mendeleev.
C)  Rutherford.
D)  Proust.
E)  none of the above

Question 3

What is the formula for an ionic compound made of aluminum and oxygen?

Accepted Answer

A)  AlO2
B)  Al2O3
C)  Al3O2
D)  AlO
E)  none of the above

Question 4

How many oxygen atoms are in the formula Al2(CO3) 3?

Accepted Answer

A)  3
B)  9
C)  1
D)  6
E)  none of the above

Question 5

Molecular elements do not exist in nature.

Accepted Answer

A) True 
 B)False

Question 6

What is the formula mass of copper(II) fluoride?

Accepted Answer

A)  101.55
B)  146.10
C)  90.00
D)  165.10
E)  none of the above

Question 7

How many C atoms are in ammonium acetate?

Accepted Answer

A)  5
B)  2
C)  1
D)  3
E)  none of the above

Question 8

What is the correct formula for the molecular compound heptaphosphorus octafluoride?

Accepted Answer

A)  P5F8
B)  P 7F6
C)  P6F7
D)  P7F8
E)  none of the above D

Question 9

The correct formula for calcium fluoride is CaF3.

Accepted Answer

A) True 
 B)False

Question 10

Ionic compounds are usually made up of a metal and a nonmetal.

Accepted Answer

A) True 
 B)False

Question 11

The oxygen-to-hydrogen mass ratio of water is always 8.0 is an example of what fundamental law?

Accepted Answer

A)  Law of Constant Composition
B)  Law of Constant Mass Ratio
C)  Law of Conservation of Mass
D)  Law of Constant Whole Number Ratio
E)  none of the above A

Question 12

What is the formula mass of magnesium nitride?

Accepted Answer

A)  38.32
B)  90.65
C)  100.95
D)  116.33
E)  none of the above

Question 13

Although some substances we encounter in our routine lives are elements,most occur in the combined state.

Accepted Answer

A) True 
 B)False

Question 14

If a chemical reaction produces the molecular element oxygen,the formula of oxygen should be written as O2 .

Accepted Answer

A) True 
 B)False

Question 15

The name trisodium phosphate is incorrect for the compound Na3PO4 because:

Accepted Answer

A)  this compound should be called trisodium monophosphate.
B)  the sodium has a negative 3 charge.
C)  you cannot use a prefix for the first element in a molecular compound.
D)  you cannot use a prefix for the first element of an ionic compound.
E)  none of the above

Question 16

The name of KNO3 is potassium nitratide.

Accepted Answer

A) True 
 B)False

Question 17

The proper name for SF6 is sulfur tetrafluoride.

Accepted Answer

A) True 
 B)False

Question 18

The subscripts in a chemical formula do not change for a given compound.

Accepted Answer

A) True 
 B)False

Question 19

How many of each type of atom are there in the formula (NH4) 2HPO4?

Accepted Answer

A)  N = 2,H = 9,P = 1,O = 4
B)  N = 1,H = 5,P = 1,O = 4
C)  N = 2,H = 5,P = 1,O = 4
D)  N = 2,H = 8,P = 1,O = 4
E)  none of the above

Question 20

The correct formula for sodium permanganate is NaMgO4.

Accepted Answer

A) True 
 B)False

Exam 5: Molecules and Compounds

The correct name for HNO3 is hydronitric acid.

Correct AnswerverifiedFalse

The first chemist to formally state the law of constant composition was:

Correct AnswerverifiedShow Answer

What is the formula for an ionic compound made of aluminum and oxygen?

Correct AnswerverifiedShow Answer

How many oxygen atoms are in the formula Al2(CO3) 3?

Correct AnswerverifiedShow Answer

Molecular elements do not exist in nature.

Correct AnswerverifiedShow Answer

What is the formula mass of copper(II) fluoride?

Correct AnswerverifiedShow Answer

How many C atoms are in ammonium acetate?

Correct AnswerverifiedShow Answer

What is the correct formula for the molecular compound heptaphosphorus octafluoride?

Correct AnswerverifiedD

The correct formula for calcium fluoride is CaF3.

Correct AnswerverifiedShow Answer

Ionic compounds are usually made up of a metal and a nonmetal.

Correct AnswerverifiedShow Answer

The oxygen-to-hydrogen mass ratio of water is always 8.0 is an example of what fundamental law?

Correct AnswerverifiedA

What is the formula mass of magnesium nitride?

Correct AnswerverifiedShow Answer

Although some substances we encounter in our routine lives are elements,most occur in the combined state.

Correct AnswerverifiedShow Answer

If a chemical reaction produces the molecular element oxygen,the formula of oxygen should be written as O2 .

Correct AnswerverifiedShow Answer

The name trisodium phosphate is incorrect for the compound Na3PO4 because:

Correct AnswerverifiedShow Answer

The name of KNO3 is potassium nitratide.

Correct AnswerverifiedShow Answer

The proper name for SF6 is sulfur tetrafluoride.

Correct AnswerverifiedShow Answer

The subscripts in a chemical formula do not change for a given compound.

Correct AnswerverifiedShow Answer

How many of each type of atom are there in the formula (NH4) 2HPO4?

Correct AnswerverifiedShow Answer

The correct formula for sodium permanganate is NaMgO4.

Correct AnswerverifiedShow Answer

The correct name for HNO₃ is hydronitric acid.

Correct Answer
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False

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How many oxygen atoms are in the formula Al₂(CO₃) ₃?

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D

The correct formula for calcium fluoride is CaF₃.

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A

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If a chemical reaction produces the molecular element oxygen,the formula of oxygen should be written as O₂ .

Correct Answer
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The name trisodium phosphate is incorrect for the compound Na₃PO₄ because:

Correct Answer
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The name of KNO₃ is potassium nitratide.

Correct Answer
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The proper name for SF₆ is sulfur tetrafluoride.

Correct Answer
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How many of each type of atom are there in the formula (NH₄) ₂HPO₄?

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The correct formula for sodium permanganate is NaMgO₄.

Correct Answer
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