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Chapter 7
Standardized Test Preparation
Preview
• Multiple Choice
• Short Answer
• Extended Response
Chapter 7
Standardized Test Preparation
Multiple Choice
1. Which of the following compounds does not contain
a polyatomic ion?
A. sodium carbonate
B. sodium sulfate
C. sodium sulfite
D. sodium sulfide
Chapter 7
Standardized Test Preparation
Multiple Choice
1. Which of the following compounds does not contain
a polyatomic ion?
A. sodium carbonate
B. sodium sulfate
C. sodium sulfite
D. sodium sulfide
Chapter 7
Standardized Test Preparation
Multiple Choice
2. The correct formula for ammonium phosphate is
A. (NH4)3PO4.
B. (NH4)2PO4.
C. NH4PO4.
D. NH4(PO4)2.
Chapter 7
Standardized Test Preparation
Multiple Choice
2. The correct formula for ammonium phosphate is
A. (NH4)3PO4.
B. (NH4)2PO4.
C. NH4PO4.
D. NH4(PO4)2.
Chapter 7
Standardized Test Preparation
Multiple Choice
3. When writing the formula for a compound that
contains a polyatomic ion,
A. write the anion’s formula first.
B. use superscripts to show the number of
polyatomic ions present.
C. use parentheses if the number of polyatomic
ions is greater than 1.
D. always place the polyatomic ion in
parentheses.
Chapter 7
Standardized Test Preparation
Multiple Choice
3. When writing the formula for a compound that
contains a polyatomic ion,
A. write the anion’s formula first.
B. use superscripts to show the number of
polyatomic ions present.
C. use parentheses if the number of polyatomic
ions is greater than 1.
D. always place the polyatomic ion in
parentheses.
Chapter 7
Standardized Test Preparation
Multiple Choice
4. The correct name for NH4CH3COO is
A. ammonium carbonate.
B. ammonium hydroxide.
C. ammonium acetate.
D. ammonium nitrate.
Chapter 7
Standardized Test Preparation
Multiple Choice
4. The correct name for NH4CH3COO is
A. ammonium carbonate.
B. ammonium hydroxide.
C. ammonium acetate.
D. ammonium nitrate.
Chapter 7
Standardized Test Preparation
Multiple Choice
5. Which of the following is the correct formula for
iron(III) sulfate?
A. Fe3SO4
B. Fe3(SO4)2
C. Fe2(SO4)3
D. 3FeSO4
Chapter 7
Standardized Test Preparation
Multiple Choice
5. Which of the following is the correct formula for
iron(III) sulfate?
A. Fe3SO4
B. Fe3(SO4)2
C. Fe2(SO4)3
D. 3FeSO4
Chapter 7
Standardized Test Preparation
Multiple Choice
6. The molecular formula for acetylene is C2H2. The
molecular formula for benzene is C6H6. The
empirical formula for both is
A. CH.
B. C2H2.
C. C6H6.
D. (CH)2.
Chapter 7
Standardized Test Preparation
Multiple Choice
6. The molecular formula for acetylene is C2H2. The
molecular formula for benzene is C6H6. The
empirical formula for both is
A. CH.
B. C2H2.
C. C6H6.
D. (CH)2.
Chapter 7
Standardized Test Preparation
Multiple Choice
7. Which of the following shows the percentage
composition of H2SO4?
A. 2.5% H, 39.1% S, 58.5% O
B. 2.1% H, 32.7% S, 65.2% O
C. 28.6% H, 14.3% S, 57.1% O
D. 33.3% H, 16.7% S, 50% O
Chapter 7
Standardized Test Preparation
Multiple Choice
7. Which of the following shows the percentage
composition of H2SO4?
A. 2.5% H, 39.1% S, 58.5% O
B. 2.1% H, 32.7% S, 65.2% O
C. 28.6% H, 14.3% S, 57.1% O
D. 33.3% H, 16.7% S, 50% O
Chapter 7
Standardized Test Preparation
Multiple Choice
8. Which of the following compounds has the highest
percentage of oxygen?
A. CH4O
B. CO2
C. H2O
D. Na2CO3
Chapter 7
Standardized Test Preparation
Multiple Choice
8. Which of the following compounds has the highest
percentage of oxygen?
A. CH4O
B. CO2
C. H2O
D. Na2CO3
Chapter 7
Standardized Test Preparation
Multiple Choice
9. The empirical formula for a compound that is 1.2%
H, 42.0% Cl, and 56.8% O is
A. HClO.
B. HClO2.
C. HClO3.
D. HClO4.
Chapter 7
Standardized Test Preparation
Multiple Choice
9. The empirical formula for a compound that is 1.2%
H, 42.0% Cl, and 56.8% O is
A. HClO.
B. HClO2.
C. HClO3.
D. HClO4.
Chapter 7
Standardized Test Preparation
Short Answer
10. When a new substance is synthesized or is
discovered experimentally, the substance is
analyzed quantitatively. What information is
obtained from this typical analysis, and how is this
information used?
Chapter 7
Standardized Test Preparation
Short Answer
10. When a new substance is synthesized or is
discovered experimentally, the substance is
analyzed quantitatively. What information is
obtained from this typical analysis, and how is this
information used?
Answer: The percentage composition is obtained and
used to determine the substance’s empirical
formula.
Chapter 7
Standardized Test Preparation
Short Answer
11. An oxide of selenium is 28.8% O. Find the
empirical formula. Assuming that the empirical
formula is also the molecular formula, name the
oxide.
Chapter 7
Standardized Test Preparation
Short Answer
11. An oxide of selenium is 28.8% O. Find the
empirical formula. Assuming that the empirical
formula is also the molecular formula, name the
oxide.
Answer: SeO2; selenium dioxide
Chapter 7
Standardized Test Preparation
Extended Response
12. What is an empirical formula, and how does it differ
from a molecular formula?
Chapter 7
Standardized Test Preparation
Extended Response
12. What is an empirical formula, and how does it differ
from a molecular formula?
Answer: The empirical formula is the simplest wholenumber ratio of the atoms in a chemical formula.
The molecular formula is the actual number of
atoms of each element in a chemical formula. The
two formulas differ by an integer factor.
Chapter 7
Standardized Test Preparation
Extended Response
13. What are Stock system names based on?
Chapter 7
Standardized Test Preparation
Extended Response
13. What are Stock system names based on?
Answer: The Stock system is based on the oxidation
number of the cation.