Question 1

The amount of atomic O relative to O2 ________.

Accepted Answer

A) is highest in the troposphere 
B) is highest in the stratosphere 
C) increases with altitude in the thermosphere 
D) decreases with altitude in the thermosphere 
E) is essentially independent of altitude in the thermosphere 
A) is highest in the troposphere 
B) is highest in the stratosphere 
C) increases with altitude in the thermosphere 
D) decreases with altitude in the thermosphere 
E) is essentially independent of altitude in the thermosphere C

Question 2

Which of the following is released by the combustion of fossil fuels?

Accepted Answer

A) N2 
B) CO2 
C) H2 
D) O2 
E) O3 
A) N2 
B) CO2 
C) H2 
D) O2 
E) O3 B

Question 3

The sterilizing action of chlorine in water is due to what substance?

Accepted Answer

A) Cl- 
B) Cl2 
C) HCl 
D) HClO 
E) H+ 
A) Cl- 
B) Cl2 
C) HCl 
D) HClO 
E) H+ D

Question 4

The average pH of the oceans is ________.

Accepted Answer

The answer of The average pH of the oceans is...

Question 5

What is the percentage of freshwater on planet Earth?

Accepted Answer

A) 97% 
B) 2.1% 
C) 2.8% 
D) 0.6% 
E) 100% 
A) 97% 
B) 2.1% 
C) 2.8% 
D) 0.6% 
E) 100%

Question 6

The reaction that forms most of the acid in acid rain is ________.

Accepted Answer

A) SO2 (g)+ H2O (l)→ H2SO4 (aq) 
B) SO2 (g)+ H2O (l)→ H2SO3 (aq) 
C) H2S (g)+ 2 O2 (g)→ H2SO4 (l) 
D) Cl2 (g)+ H2O (l)→ HCl (aq)+ HClO (aq) 
E) SO3 (g)+ H2O (l)→ H2SO4 (aq) 
A) SO2 (g)+ H2O (l)→ H2SO4 (aq) 
B) SO2 (g)+ H2O (l)→ H2SO3 (aq) 
C) H2S (g)+ 2 O2 (g)→ H2SO4 (l) 
D) Cl2 (g)+ H2O (l)→ HCl (aq)+ HClO (aq) 
E) SO3 (g)+ H2O (l)→ H2SO4 (aq)

Question 7

Which of the following is classified as a supercritical fluid?

Accepted Answer

A) water 
B) xylene 
C) toluene 
D) hydrogen peroxide 
E) none of the above 
A) water 
B) xylene 
C) toluene 
D) hydrogen peroxide 
E) none of the above

Question 8

The concentration of CO in a room is 7.2 ppm.If the total pressure is 695 torr,then the partial pressure of CO is ________ torr.

Accepted Answer

A) 5.0 ×   
B) 5.0 
C) 1.0 × 104 
D) 5.0 ×   
E) 9.7 × 107 
A) 5.0 ×   
B) 5.0 
C) 1.0 × 104 
D) 5.0 ×   
E) 9.7 × 107

Question 9

How does lime reduce sulfur dioxide emissions from the burning of coal?

Accepted Answer

A) It reacts with the sulfur dioxide to form calcium sulfite solid that can be precipitated. 
B) It reduces the sulfur dioxide to elemental sulfur that is harmless to the environment. 
C) It oxidizes the sulfur dioxide to tetrathionate that is highly water soluble so it can be scrubbed from the emission gases. 
D) It catalyzes the conversion of sulfur dioxide to sulfur trioxide which is much less volatile and can be removed by condensation. 
E) It converts S   to solid, elemental sulfur. 
A) It reacts with the sulfur dioxide to form calcium sulfite solid that can be precipitated. 
B) It reduces the sulfur dioxide to elemental sulfur that is harmless to the environment. 
C) It oxidizes the sulfur dioxide to tetrathionate that is highly water soluble so it can be scrubbed from the emission gases. 
D) It catalyzes the conversion of sulfur dioxide to sulfur trioxide which is much less volatile and can be removed by condensation. 
E) It converts S   to solid, elemental sulfur.

Question 10

Radiation in the infrared portion of the spectrum is absorbed by ________ found in the atmosphere.

Accepted Answer

A) N2 
B) O2 
C) CO2 
D) Ar 
E) He 
A) N2 
B) O2 
C) CO2 
D) Ar 
E) He

Question 11

Chemical treatment of municipal water supplies commonly entails use of CaO,Al2(SO4)3,and Cl2.The purpose of adding CaO is to ________.

Accepted Answer

A) remove all HCO3- as solid CaCO3 
B) remove all SO42- as solid CaSO4 
C) remove all Cl- as solid CaCl2 
D) selectively kill anaerobic (but not aerobic)bacteria 
E) make the water slightly basic so that addition of Al2(SO4)3 will afford a gelatinous precipitate of Al(OH)3 
A) remove all HCO3- as solid CaCO3 
B) remove all SO42- as solid CaSO4 
C) remove all Cl- as solid CaCl2 
D) selectively kill anaerobic (but not aerobic)bacteria 
E) make the water slightly basic so that addition of Al2(SO4)3 will afford a gelatinous precipitate of Al(OH)3

Question 12

The majority of SO2 released annually in the United States results from ________.

Accepted Answer

A) combustion of oil 
B) acid rain 
C) combustion of coal 
D) depletion of ozone by CFCs 
E) all of the above 
A) combustion of oil 
B) acid rain 
C) combustion of coal 
D) depletion of ozone by CFCs 
E) all of the above

Question 13

In the world's oceans,the average salinity is about ________ g/kg.

Accepted Answer

A) 0.03 
B) 0.1 
C) 35 
D) 17 
E) 3.5 
A) 0.03 
B) 0.1 
C) 35 
D) 17 
E) 3.5

Question 14

Natural,unpolluted rainwater is typically acidic.What is the source of this natural acidity?

Accepted Answer

A) CO2 
B) SO2 
C) NO2 
D) HCl 
E) chlorofluorocarbons 
A) CO2 
B) SO2 
C) NO2 
D) HCl 
E) chlorofluorocarbons

Question 15

Components of Air Mole Fraction Nitrogen 0.781
Oxygen 0.209
Argon 0.010
What is the partial pressure or argon (in torr)in the atmosphere when the atmospheric pressure is 750.0 torr?

Accepted Answer

A) 157 
B) 586 
C) 611 
D) 7.50 
E) 760 
A) 157 
B) 586 
C) 611 
D) 7.50 
E) 760

Question 16

The concentration of carbon monoxide in a sample of air is 6.0 ppm.There are ________ molecules of CO in 1.00 L of this air at 755 torr and 23 °C.

Accepted Answer

A) 2.5 ×   
B) 1.4 ×   
C) 1.9 ×   
D) 1.1 ×   
E) 1.5 ×   
A) 2.5 ×   
B) 1.4 ×   
C) 1.9 ×   
D) 1.1 ×   
E) 1.5 ×

Question 17

The absorption of a photon which results in bond breaking is known as ________.

Accepted Answer

The answer of The absorption of a photon which results...

Question 18

The layer of the atmosphere that contains our weather is called the ________.

Accepted Answer

A) mesosphere 
B) heterosphere 
C) stratosphere 
D) thermosphere 
E) troposphere 
A) mesosphere 
B) heterosphere 
C) stratosphere 
D) thermosphere 
E) troposphere

Question 19

Of the reactions involved in the photodecomposition of ozone (shown below),which are exothermic? 1.O2 (g)+ hν → O (g)+ O (g)
2.O (g)+ O2 (g)+ M (g)→ O3 (g)+ M* (g)
3.O3 (g)+ hν → O2 (g)+ O (g)
4.O (g)+ O (g)+ M (g)→ O2 (g)+ M* (g)

Accepted Answer

A) 2 and 4 
B) 1 and 3 
C) 1, 2, and 4 
D) 2 only 
E) all of them 
A) 2 and 4 
B) 1 and 3 
C) 1, 2, and 4 
D) 2 only 
E) all of them

Question 20

How can the presence of biodegradable waste in a lake result in the death of fish in the lake?

Accepted Answer

Bacteria utilize oxy

Exam 18: Chemistry of the Environment

The amount of atomic O relative to O2 ________.

Which of the following is released by the combustion of fossil fuels?

The sterilizing action of chlorine in water is due to what substance?

The average pH of the oceans is ________.

What is the percentage of freshwater on planet Earth?

The reaction that forms most of the acid in acid rain is ________.

Which of the following is classified as a supercritical fluid?

The concentration of CO in a room is 7.2 ppm.If the total pressure is 695 torr,then the partial pressure of CO is ________ torr.

How does lime reduce sulfur dioxide emissions from the burning of coal?

Radiation in the infrared portion of the spectrum is absorbed by ________ found in the atmosphere.

Chemical treatment of municipal water supplies commonly entails use of CaO,Al2(SO4)3,and Cl2.The purpose of adding CaO is to ________.

The majority of SO2 released annually in the United States results from ________.

In the world's oceans,the average salinity is about ________ g/kg.

Natural,unpolluted rainwater is typically acidic.What is the source of this natural acidity?

Components of Air Mole Fraction Nitrogen 0.781 Oxygen 0.209 Argon 0.010 What is the partial pressure or argon (in torr)in the atmosphere when the atmospheric pressure is 750.0 torr?

The concentration of carbon monoxide in a sample of air is 6.0 ppm.There are ________ molecules of CO in 1.00 L of this air at 755 torr and 23 °C.

The absorption of a photon which results in bond breaking is known as ________.

The layer of the atmosphere that contains our weather is called the ________.

Of the reactions involved in the photodecomposition of ozone (shown below),which are exothermic? 1.O2 (g)+ hν → O (g)+ O (g) 2.O (g)+ O2 (g)+ M (g)→ O3 (g)+ M* (g) 3.O3 (g)+ hν → O2 (g)+ O (g) 4.O (g)+ O (g)+ M (g)→ O2 (g)+ M* (g)

How can the presence of biodegradable waste in a lake result in the death of fish in the lake?

Introduction: Matter, energy, and Measurement

Atoms, molecules, and Ions

Chemical Reactions and Reaction Stoichiometry

Reactions in Aqueous Solution

Thermochemistry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Molecular Geometry and Bonding Theories

Gases

Liquids and Intermolecular Forces

Solids and Modern Materials

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Aqueous Equilibria

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Chemistry of the Nonmetals

Transition Metals and Coordination Chemistry

The Chemistry of Life: Organic and Biological Chemistry

Filters

The amount of atomic O relative to O₂ ________.

Chemical treatment of municipal water supplies commonly entails use of CaO,Al₂(SO₄)₃,and Cl₂.The purpose of adding CaO is to ________.

The majority of SO₂ released annually in the United States results from ________.

Of the reactions involved in the photodecomposition of ozone (shown below),which are exothermic? 1.O₂ (g)+ hν → O (g)+ O (g) 2.O (g)+ O₂(g)+ M (g)→ O₃(g)+ M^* (g) 3.O₃(g)+ hν → O₂ (g)+ O (g) 4.O (g)+ O (g)+ M (g)→ O₂ (g)+ M^* (g)