Question 1

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 2

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

Question 3

The fact that water has an oxygen-to-hydrogen mass ratio of 8.0 illustrates the law of conservation of mass.

Accepted Answer

A) True 
 B)False

Question 4

What is the name of Ca(NO3)2?

Accepted Answer

A) calcium dinitrite 
B) calcium nitrate 
C) calcium nitride 
D) calcium nitrite 
E) none of the above 
A) calcium dinitrite 
B) calcium nitrate 
C) calcium nitride 
D) calcium nitrite 
E) none of the above

Question 5

The proper name for HI is hydroiodic acid.

Accepted Answer

A) True 
 B)False

Question 6

Ammonium fluoride 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 7

What is the name of HI (aq)?

Accepted Answer

A) hydroiodous acid 
B) hydroiodic acid 
C) iodic acid 
D) iodous acid 
E) none of the above 
A) hydroiodous acid 
B) hydroiodic acid 
C) iodic acid 
D) iodous acid 
E) none of the above

Question 8

The charge of a vanadium ion in the compound V2O5 is:

Accepted Answer

A) 5+ 
B) 2+ 
C) 10+ 
D) 10- 
E) none of the above 
A) 5+ 
B) 2+ 
C) 10+ 
D) 10- 
E) none of the above

Question 9

What is the correct formula for potassium dichromate?

Accepted Answer

A) K(CrO4)2 
B) KCr2O7 
C) K2CrO4 
D) K2Cr2O7 
E) none of the above 
A) K(CrO4)2 
B) KCr2O7 
C) K2CrO4 
D) K2Cr2O7 
E) none of the above

Question 10

The ratio in a chemical formula is a ratio of atoms,not a ratio of masses.

Accepted Answer

A) True 
 B)False

Question 11

How many of each type of atom are there in the formula Ca3(PO4)2?

Accepted Answer

A) Ca = 3,P = 1,O = 4 
B) Ca = 3,P = 2,O = 4 
C) Ca = 3,P = 2,O = 8 
D) Ca = 3,P = 1,O = 8 
E) none of the above 
A) Ca = 3,P = 1,O = 4 
B) Ca = 3,P = 2,O = 4 
C) Ca = 3,P = 2,O = 8 
D) Ca = 3,P = 1,O = 8 
E) none of the above

Question 12

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 13

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 14

Which metal atom below cannot form a cation of several different charges?

Accepted Answer

A) Cr 
B) Mn 
C) Fe 
D) Ba 
E) none of the above 
A) Cr 
B) Mn 
C) Fe 
D) Ba 
E) none of the above

Question 15

The properties of a compound are an average of the properties of the individual elements.

Accepted Answer

A) True 
 B)False

Question 16

A student wrote the formula for the compound aluminum phosphate as AlPO4.What is wrong with this formula?

Accepted Answer

A) The compound is not charge-neutral. 
B) Aluminum is a nonmetal so it cannot form an ionic compound. 
C) The formula should be Al(PO4). 
D) There cannot be three different atom types in a chemical formula. 
E) Nothing is wrong with the formula. 
A) The compound is not charge-neutral. 
B) Aluminum is a nonmetal so it cannot form an ionic compound. 
C) The formula should be Al(PO4). 
D) There cannot be three different atom types in a chemical formula. 
E) Nothing is wrong with the formula.

Question 17

What is the formula mass for diboron tetrachloride?

Accepted Answer

A) 127.98 amu 
B) 198.89 amu 
C) 234.34 amu 
D) 163.43 amu 
E) none of the above 
A) 127.98 amu 
B) 198.89 amu 
C) 234.34 amu 
D) 163.43 amu 
E) none of the above

Question 18

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 19

Ionic compounds always contain positive and negative ions.

Accepted Answer

A) True 
 B)False

Question 20

The basic unit of an ionic compound is called the formula unit.

Accepted Answer

A) True 
 B)False

Which formula shows the proper use of parentheses?

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

The fact that water has an oxygen-to-hydrogen mass ratio of 8.0 illustrates the law of conservation of mass.

What is the name of Ca(NO₃)₂?

The proper name for HI is hydroiodic acid.

Ammonium fluoride is considered which of the following?

What is the name of HI (aq)?

The charge of a vanadium ion in the compound V₂O₅ is:

What is the correct formula for potassium dichromate?

The ratio in a chemical formula is a ratio of atoms,not a ratio of masses.

How many of each type of atom are there in the formula Ca₃(PO₄)₂?

What would the formula of diiodine pentasulfide be?

When elements combine to form compounds:

Which metal atom below cannot form a cation of several different charges?

The properties of a compound are an average of the properties of the individual elements.

A student wrote the formula for the compound aluminum phosphate as AlPO₄.What is wrong with this formula?

What is the formula mass for diboron tetrachloride?

Which of the following is a molecular compound?

Ionic compounds always contain positive and negative ions.

The basic unit of an ionic compound is called the formula unit.

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

Which formula shows the proper use of parentheses?

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

The fact that water has an oxygen-to-hydrogen mass ratio of 8.0 illustrates the law of conservation of mass.

What is the name of Ca(NO3)2?

The proper name for HI is hydroiodic acid.

Ammonium fluoride is considered which of the following?

What is the name of HI (aq)?

The charge of a vanadium ion in the compound V2O5 is:

What is the correct formula for potassium dichromate?

The ratio in a chemical formula is a ratio of atoms,not a ratio of masses.

How many of each type of atom are there in the formula Ca3(PO4)2?

What would the formula of diiodine pentasulfide be?

When elements combine to form compounds:

Which metal atom below cannot form a cation of several different charges?

The properties of a compound are an average of the properties of the individual elements.

A student wrote the formula for the compound aluminum phosphate as AlPO4.What is wrong with this formula?

What is the formula mass for diboron tetrachloride?

Which of the following is a molecular compound?

Ionic compounds always contain positive and negative ions.

The basic unit of an ionic compound is called the formula unit.

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

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

What is the name of Ca(NO₃)₂?

The charge of a vanadium ion in the compound V₂O₅ is:

How many of each type of atom are there in the formula Ca₃(PO₄)₂?

A student wrote the formula for the compound aluminum phosphate as AlPO₄.What is wrong with this formula?