Chapter 7 Preview Multiple Choice Short Answer Extended Response Standardized Test Preparation

Chapter 7

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• Multiple Choice

• Short Answer

• Extended Response

Standardized Test Preparation

Chapter 7Chapter 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 7Chapter 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 7Chapter 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 7Chapter 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 7Chapter 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 7Chapter 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 7Chapter 7 Standardized Test Preparation

4. The correct name for NH4CH3COO is

A. ammonium carbonate.

B. ammonium hydroxide.

C. ammonium acetate.

D. ammonium nitrate.

Multiple Choice

Chapter 7Chapter 7 Standardized Test Preparation

4. The correct name for NH4CH3COO is

A. ammonium carbonate.

B. ammonium hydroxide.

C. ammonium acetate.

D. ammonium nitrate.

Multiple Choice

Chapter 7Chapter 7 Standardized Test Preparation

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

Multiple Choice

Chapter 7Chapter 7 Standardized Test Preparation

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

Multiple Choice

Chapter 7Chapter 7 Standardized Test Preparation

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.

Multiple Choice

Chapter 7Chapter 7 Standardized Test Preparation

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.

Multiple Choice

Chapter 7Chapter 7 Standardized Test Preparation

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

Multiple Choice

Chapter 7Chapter 7 Standardized Test Preparation

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

Multiple Choice

Chapter 7Chapter 7 Standardized Test Preparation

8. Which of the following compounds has the highest percentage of oxygen?

A. CH4O

B. CO2

C. H2O

D. Na2CO3

Multiple Choice

Chapter 7Chapter 7 Standardized Test Preparation

8. Which of the following compounds has the highest percentage of oxygen?

A. CH4O

B. CO2

C. H2O

D. Na2CO3

Multiple Choice

Chapter 7Chapter 7 Standardized Test Preparation

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.

Multiple Choice

Chapter 7Chapter 7 Standardized Test Preparation

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.

Multiple Choice

Chapter 7Chapter 7 Standardized Test Preparation

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?

Short Answer

Chapter 7Chapter 7 Standardized Test Preparation

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.

Short Answer

Chapter 7Chapter 7 Standardized Test Preparation

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.

Short Answer

Chapter 7Chapter 7 Standardized Test Preparation

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

Short Answer

Chapter 7Chapter 7 Standardized Test Preparation

12. What is an empirical formula, and how does it differ from a molecular formula?

Extended Response

Chapter 7Chapter 7 Standardized Test Preparation

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.

Extended Response

Chapter 7Chapter 7 Standardized Test Preparation

13. What are Stock system names based on?

Extended Response

Chapter 7Chapter 7 Standardized Test Preparation

13. What are Stock system names based on?

Answer: The Stock system is based on the oxidation number of the cation.

Extended Response