1. Preview Multiple Choice Short Answer Extended Response
Standardized Test Preparation
Preview
Multiple Choice
Short Answer
Extended Response

2. Chapter 7 Multiple Choice
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

3. Chapter 7 Multiple Choice
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

4. Chapter 7 Multiple Choice
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.

5. Chapter 7 Multiple Choice
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.

6. Chapter 7 Multiple Choice
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.

7. Chapter 7 Multiple Choice
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.

8. Chapter 7 Multiple Choice 4. The correct name for NH4CH3COO is
Standardized Test Preparation
Multiple Choice
4. The correct name for NH4CH3COO is
A. ammonium carbonate.
B. ammonium hydroxide.
C. ammonium acetate.
D. ammonium nitrate.

9. Chapter 7 Multiple Choice 4. The correct name for NH4CH3COO is
Standardized Test Preparation
Multiple Choice
4. The correct name for NH4CH3COO is
A. ammonium carbonate.
B. ammonium hydroxide.
C. ammonium acetate.
D. ammonium nitrate.

10. Chapter 7 Multiple Choice
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

11. Chapter 7 Multiple Choice
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

12. Chapter 7 Multiple Choice
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.

13. Chapter 7 Multiple Choice
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.

14. Chapter 7 Multiple Choice
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

15. Chapter 7 Multiple Choice
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

16. Chapter 7 Multiple Choice
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

17. Chapter 7 Multiple Choice
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

18. Chapter 7 Multiple Choice
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.

19. Chapter 7 Multiple Choice
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.

20. 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?

21. 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.

22. 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.

23. 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

24. Chapter 7 Extended Response
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Extended Response
12. What is an empirical formula, and how does it differ from a molecular formula?

25. Chapter 7 Extended Response
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 whole-number 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.

26. Chapter 7 Extended Response 13. What are Stock system names based on?
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Extended Response
13. What are Stock system names based on?

27. Chapter 7 Extended Response 13. What are Stock system names based on?
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.