Question 1

The formula of a compound comprised of two nitrogen atoms and one oxygen atom should be written properly as ON2.

Accepted Answer

A) True 
 B)False  False

Question 2

Choose the pair of names and formulas that do NOT match.

Accepted Answer

A) copper(I)nitrate: CuNO3 
B) copper(II)nitride: Cu3N2 
C) copper(II)nitrate: Cu(NO3)2 
D) copper(II)nitrite: Cu(NO2)2 
E) all of these are correct 
A) copper(I)nitrate: CuNO3 
B) copper(II)nitride: Cu3N2 
C) copper(II)nitrate: Cu(NO3)2 
D) copper(II)nitrite: Cu(NO2)2 
E) all of these are correct E

Question 3

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

Accepted Answer

A) 8 
B) 9 
C) 12 
D) 14 
E) none of the above 
A) 8 
B) 9 
C) 12 
D) 14 
E) none of the above D

Question 4

Which of the following is a molecular compound?

Accepted Answer

A) barium sulfide 
B) calcium acetate 
C) potassium hydroxide 
D) nitrogen monoxide 
E) none of the above 
A) barium sulfide 
B) calcium acetate 
C) potassium hydroxide 
D) nitrogen monoxide 
E) none of the above

Question 5

How many O atoms are present in sodium chlorite?

Accepted Answer

A) 2 
B) 6 
C) 4 
D) 1 
E) none of the above 
A) 2 
B) 6 
C) 4 
D) 1 
E) none of the above

Question 6

If there are two ions in a series of oxoanions,the one with more oxygen is given the ending "-ite."

Accepted Answer

A) True 
 B)False

Question 7

What is the formula mass for potassium nitrate?

Accepted Answer

A) 92.99 amu 
B) 117.11 amu 
C) 85.11 amu 
D) 101.10 amu 
E) none of the above 
A) 92.99 amu 
B) 117.11 amu 
C) 85.11 amu 
D) 101.10 amu 
E) none of the above

Question 8

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 9

How many of each type of atoms are there in the formula NH4C2H3O2?

Accepted Answer

A) N = 4,H = 7,C = 2,O = 2 
B) N = 1,H = 4,C = 2,O = 2 
C) N = 1,H = 3,C = 2,O = 2 
D) N = 1,H = 7,C = 2,O = 2 
E) none of the above 
A) N = 4,H = 7,C = 2,O = 2 
B) N = 1,H = 4,C = 2,O = 2 
C) N = 1,H = 3,C = 2,O = 2 
D) N = 1,H = 7,C = 2,O = 2 
E) none of the above

Question 10

Which formula shows the proper use of parentheses?

Accepted Answer

A) Ca(F)2 
B) Ca(SO4) 
C) (NH4)3(PO4) 
D) Ca(NO3)2 
E) none of the above 
A) Ca(F)2 
B) Ca(SO4) 
C) (NH4)3(PO4) 
D) Ca(NO3)2 
E) none of the above

Question 11

The law of constant composition states:

Accepted Answer

A) Matter cannot be either created or destroyed in a chemical reaction. 
B) The nucleus is a dense region of positive charge that always contains protons and neutrons. 
C) All samples of a given compound have the same proportions of their constituent elements. 
D) All atoms of a given element have a constant composition and are different than atoms of any other element. 
E) none of the above 
A) Matter cannot be either created or destroyed in a chemical reaction. 
B) The nucleus is a dense region of positive charge that always contains protons and neutrons. 
C) All samples of a given compound have the same proportions of their constituent elements. 
D) All atoms of a given element have a constant composition and are different than atoms of any other element. 
E) none of the above

Question 12

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 13

Which of the following has the largest formula mass?

Accepted Answer

A) CO2 
B) SO2 
C) NO2 
D) SiO2 
E) H2O 
A) CO2 
B) SO2 
C) NO2 
D) SiO2 
E) H2O

Question 14

What is correct name of the compound whose formula is N2O4?

Accepted Answer

A) nitrogen dioxide 
B) nitrogen tetroxide 
C) dinitrogen oxide 
D) dinitrogen tetroxide 
E) none of the above 
A) nitrogen dioxide 
B) nitrogen tetroxide 
C) dinitrogen oxide 
D) dinitrogen tetroxide 
E) none of the above

Question 15

When elements combine to form compounds,

Accepted Answer

A) their properties are an average of all elements in the compound. 
B) their properties change completely. 
C) their properties do not change. 
D) their properties are completely random. 
E) none of the above 
A) their properties are an average of all elements in the compound. 
B) their properties change completely. 
C) their properties do not change. 
D) their properties are completely random. 
E) none of the above

Question 16

What would the formula of diiodine pentasulfide be?

Accepted Answer

A) I5S2 
B) I2S5 
C) I4S9 
D) I2S7 
E) none of the above 
A) I5S2 
B) I2S5 
C) I4S9 
D) I2S7 
E) none of the above

Question 17

The subscripts in a chemical formula represent the relative mass of each atom in a chemical compound.

Accepted Answer

A) True 
 B)False

Question 18

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 19

Carbon is considered which of the following?

Accepted Answer

A) atomic element 
B) molecular element 
C) molecular compound 
D) ionic compound 
E) none of the above 
A) atomic element 
B) molecular element 
C) molecular compound 
D) ionic compound 
E) none of the above

Question 20

What is the correct formula for ammonium hydrogen sulfate?

Accepted Answer

A) NH4HSO4 
B) (NH4)2HSO4 
C) (NH4)2SO4 
D) Am2HSO4 
E) none of the above 
A) NH4HSO4 
B) (NH4)2HSO4 
C) (NH4)2SO4 
D) Am2HSO4 
E) none of the above

The formula of a compound comprised of two nitrogen atoms and one oxygen atom should be written properly as ON₂.

Choose the pair of names and formulas that do NOT match.

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

Which of the following is a molecular compound?

How many O atoms are present in sodium chlorite?

If there are two ions in a series of oxoanions,the one with more oxygen is given the ending "-ite."

What is the formula mass for potassium nitrate?

How many C atoms are in ammonium acetate?

How many of each type of atoms are there in the formula NH₄C₂H₃O₂?

Which formula shows the proper use of parentheses?

The law of constant composition states:

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

Which of the following has the largest formula mass?

What is correct name of the compound whose formula is N₂O₄?

When elements combine to form compounds,

What would the formula of diiodine pentasulfide be?

The subscripts in a chemical formula represent the relative mass of each atom in a chemical compound.

The name trisodium phosphate is incorrect for the compound Na₃PO₄ because

Carbon is considered which of the following?

What is the correct formula for ammonium hydrogen sulfate?

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

The formula of a compound comprised of two nitrogen atoms and one oxygen atom should be written properly as ON2.

Choose the pair of names and formulas that do NOT match.

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

Which of the following is a molecular compound?

How many O atoms are present in sodium chlorite?

If there are two ions in a series of oxoanions,the one with more oxygen is given the ending "-ite."

What is the formula mass for potassium nitrate?

How many C atoms are in ammonium acetate?

How many of each type of atoms are there in the formula NH4C2H3O2?

Which formula shows the proper use of parentheses?

The law of constant composition states:

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

Which of the following has the largest formula mass?

What is correct name of the compound whose formula is N2O4?

When elements combine to form compounds,

What would the formula of diiodine pentasulfide be?

The subscripts in a chemical formula represent the relative mass of each atom in a chemical compound.

The name trisodium phosphate is incorrect for the compound Na3PO4 because

Carbon is considered which of the following?

What is the correct formula for ammonium hydrogen sulfate?

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 formula of a compound comprised of two nitrogen atoms and one oxygen atom should be written properly as ON₂.

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

How many of each type of atoms are there in the formula NH₄C₂H₃O₂?

What is correct name of the compound whose formula is N₂O₄?

The name trisodium phosphate is incorrect for the compound Na₃PO₄ because