Question 1

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

Question 2

The correct name for HNO3 is hydronitric acid.

Accepted Answer

A) True 
 B)False  False

Question 3

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) 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 4

The name of KNO3 is potassium nitratide.

Accepted Answer

A) True 
 B)False

Question 5

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 6

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 
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 7

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

Question 8

The correct formula for calcium fluoride is CaF3.

Accepted Answer

A) True 
 B)False

Question 9

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

Question 10

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

Question 11

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

Question 12

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

Accepted Answer

A) True 
 B)False

Question 13

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

Question 14

How many C atoms are in ammonium acetate?

Accepted Answer

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

Question 15

Molecular elements do not exist in nature.

Accepted Answer

A) True 
 B)False

Question 16

The correct formula for sodium permanganate is NaMgO4.

Accepted Answer

A) True 
 B)False

Question 17

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

Accepted Answer

A) True 
 B)False

Question 18

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 
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 19

The proper name for SF6 is sulfur tetrafluoride.

Accepted Answer

A) True 
 B)False

Question 20

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

Accepted Answer

A) True 
 B)False

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

The correct name for HNO₃ is hydronitric acid.

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

The name of KNO₃ is potassium nitratide.

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

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

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

The correct formula for calcium fluoride is CaF₃.

What is the formula mass of magnesium nitride?

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

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

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

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

How many C atoms are in ammonium acetate?

Molecular elements do not exist in nature.

The correct formula for sodium permanganate is NaMgO₄.

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

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

The proper name for SF₆ is sulfur tetrafluoride.

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

The Chemical World

Measurement and Problem Solving

Matter and Energy

Atoms and Elements

Chemical Composition

Chemical Reactions

Quantities in Chemical Reactions

Electrons in Atoms and the Periodic Table

Chemical Bonding

Gases

Liquids, solids, and Intermolecular Forces

Solutions

Acids and Bases

Chemical Equilibrium

Oxidation and Reduction

Radioactivity and Nuclear Chemistry

Organic Chemistry

Biochemistry

Filters

Exam 5: Molecules and Compounds

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

The correct name for HNO3 is hydronitric acid.

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

The name of KNO3 is potassium nitratide.

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

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

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

The correct formula for calcium fluoride is CaF3.

What is the formula mass of magnesium nitride?

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

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

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

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

How many C atoms are in ammonium acetate?

Molecular elements do not exist in nature.

The correct formula for sodium permanganate is NaMgO4.

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

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

The proper name for SF6 is sulfur tetrafluoride.

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

The Chemical World

Measurement and Problem Solving

Matter and Energy

Atoms and Elements

Chemical Composition

Chemical Reactions

Quantities in Chemical Reactions

Electrons in Atoms and the Periodic Table

Chemical Bonding

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 name for HNO₃ is hydronitric acid.

The name of KNO₃ is potassium nitratide.

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

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

The correct formula for calcium fluoride is CaF₃.

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

The correct formula for sodium permanganate is NaMgO₄.

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

The proper name for SF₆ is sulfur tetrafluoride.