Question 1

The most abundant component of air is ________.

Accepted Answer

The answer of The most abundant component of air is...

Question 2

Which of the following is not a stage in water treatment?

Accepted Answer

A) coarse filtration 
B) aeration 
C) chlorination 
D) distillation 
E) settling 
A) coarse filtration 
B) aeration 
C) chlorination 
D) distillation 
E) settling

Question 3

Which one of the following is produced by anaerobic bacteria after decomposing biodegradable nitrogen-containing waste?

Accepted Answer

A) NH3 
B) NO2 
C) N2O 
D) NO3- 
E) NH4+ 
A) NH3 
B) NO2 
C) N2O 
D) NO3- 
E) NH4+

Question 4

The C-Cl and C-F bond dissociation energies in CF3Cl are 339 kJ/mol and 482 kJ/mol,respectively.The maximum wavelengths of electromagnetic radiation required to rupture these bonds are ________ and ________,respectively.

Accepted Answer

A) 45.0 nm, 307 nm 
B) 742 nm, 654 nm 
C) 482 nm, 248 nm 
D) 353 nm, 248 nm 
E) 979 nm, 953 nm 
A) 45.0 nm, 307 nm 
B) 742 nm, 654 nm 
C) 482 nm, 248 nm 
D) 353 nm, 248 nm 
E) 979 nm, 953 nm

Question 5

The dissociation energy of N2 is 941 kJ/mol.The maximum wavelength of light that has enough energy per photon to dissociate the N2 molecule is ________ nm.

Accepted Answer

A) 3137 
B) 1.27 ×   
C) 1.27 ×   
D) 1.27 ×   
E) 127 
A) 3137 
B) 1.27 ×   
C) 1.27 ×   
D) 1.27 ×   
E) 127

Question 6

Of the noble gases,________ is present in highest concentration in dry air at sea level.

Accepted Answer

A) Ne 
B) He 
C) Xe 
D) Kr 
E) Ar 
A) Ne 
B) He 
C) Xe 
D) Kr 
E) Ar

Question 7

The acidic water of a lake (V = 4 × 108 L)must be neutralized with lime,CaO.It will require a minimum of ________ grams of lime to adjust the pH from 5.6 to 6.5.

Accepted Answer

A) 2 × 104 
B) 5 × 104 
C) 1 × 105 
D) 3 × 104 
E) 5 
A) 2 × 104 
B) 5 × 104 
C) 1 × 105 
D) 3 × 104 
E) 5

Question 8

The concentration of ozone in a sample of air that has a partial pressure of O3 of 0.53 torr and a total pressure of air of 695 torr is ________ ppm.

Accepted Answer

A) 7.6 ×   
B) 0.76 
C) 0.076 
D) 1.3 ×   
E) 1.3 
A) 7.6 ×   
B) 0.76 
C) 0.076 
D) 1.3 ×   
E) 1.3

Question 9

Of the compounds below,the one that requires the shortest wavelength for photoionization is ________.

Accepted Answer

A) O 
B) O2 
C) NO 
D) N2 
E) They all require the same wavelength. 
A) O 
B) O2 
C) NO 
D) N2 
E) They all require the same wavelength.

Question 10

The ionization energy of NO is 890 kJ/mol: NO + hv → NO+ +   The maximum wavelength of light capable of causing the ionization of NO is ________ nm.

Accepted Answer

A) 2967 
B) 1.35 × 10-4 
C) 1.35 × 10-7 
D) 134.5 
E) 1.35 × 105 
A) 2967 
B) 1.35 × 10-4 
C) 1.35 × 10-7 
D) 134.5 
E) 1.35 × 105

Question 11

Incomplete combustion of carbon-containing materials occurs when ________.

Accepted Answer

A) there is insufficient oxygen to convert all of the carbon to carbon dioxide 
B) there are sulfur impurities in the carbon-containing material 
C) the carbon-containing material is a gas 
D) the combustion flame is too hot 
E) there is an excess of oxygen 
A) there is insufficient oxygen to convert all of the carbon to carbon dioxide 
B) there are sulfur impurities in the carbon-containing material 
C) the carbon-containing material is a gas 
D) the combustion flame is too hot 
E) there is an excess of oxygen

Question 12

In the presence of oxygen,the nitrogen present in biodegradable material ends up mainly as ________.

Accepted Answer

A) NO3- 
B) NO2 
C) N2O 
D) NH3 
E) NH4+ 
A) NO3- 
B) NO2 
C) N2O 
D) NH3 
E) NH4+

Question 13

The concept that radiowave propagation was affected by the atmosphere of the earth was discovered by ________.

Accepted Answer

The answer of The concept that radiowave propagation was affected...

Question 14

In the purification of drinking water,the filtered water is made basic by adding ________,then particles and bacteria are captured by adding Al2(SO4)3.

Accepted Answer

Question 15

In the past,CFCs were used in which of the following?

Accepted Answer

A) spray cans 
B) plastic manufacturing 
C) air conditioners 
D) refrigerators 
E) all of the above 
A) spray cans 
B) plastic manufacturing 
C) air conditioners 
D) refrigerators 
E) all of the above

Question 16

Nitrogen oxides catalytically destroy ozone.

Accepted Answer

A) True 
 B)False

Question 17

What is the concentration (ppm)of helium in the atmosphere if the mole fraction of helium in dry air near sea level is 0.00000524?

Accepted Answer

A) 5.24 
B) 1.91 × 1011 
C) 5.24 × 10-4 
D) 5240 
E) 5.24 × 10-12 
A) 5.24 
B) 1.91 × 1011 
C) 5.24 × 10-4 
D) 5240 
E) 5.24 × 10-12

Question 18

How many liters of water does the average adult in the U.S.require?

Accepted Answer

The answer of How many liters of water does the...

Question 19

Compounds found in fossil fuels that contain ________ are primarily responsible for acid rain.

Accepted Answer

A) sulfur 
B) carbon 
C) hydrogen 
D) phosphorus 
E) neon 
A) sulfur 
B) carbon 
C) hydrogen 
D) phosphorus 
E) neon

Question 20

CFC stands for ________.

Accepted Answer

A) chlorinated freon compound 
B) chlorofluorocarbon 
C) carbonated fluorine compound 
D) caustic fluorine carbohydrate 
E) carbofluoro compound 
A) chlorinated freon compound 
B) chlorofluorocarbon 
C) carbonated fluorine compound 
D) caustic fluorine carbohydrate 
E) carbofluoro compound

Exam 18: Chemistry of the Environment

The most abundant component of air is ________.

Which of the following is not a stage in water treatment?

Which one of the following is produced by anaerobic bacteria after decomposing biodegradable nitrogen-containing waste?

The C-Cl and C-F bond dissociation energies in CF3Cl are 339 kJ/mol and 482 kJ/mol,respectively.The maximum wavelengths of electromagnetic radiation required to rupture these bonds are ________ and ________,respectively.

The dissociation energy of N2 is 941 kJ/mol.The maximum wavelength of light that has enough energy per photon to dissociate the N2 molecule is ________ nm.

Of the noble gases,________ is present in highest concentration in dry air at sea level.

The acidic water of a lake (V = 4 × 108 L)must be neutralized with lime,CaO.It will require a minimum of ________ grams of lime to adjust the pH from 5.6 to 6.5.

The concentration of ozone in a sample of air that has a partial pressure of O3 of 0.53 torr and a total pressure of air of 695 torr is ________ ppm.

Of the compounds below,the one that requires the shortest wavelength for photoionization is ________.

The ionization energy of NO is 890 kJ/mol: NO + hv → NO+ + The maximum wavelength of light capable of causing the ionization of NO is ________ nm.

Incomplete combustion of carbon-containing materials occurs when ________.

In the presence of oxygen,the nitrogen present in biodegradable material ends up mainly as ________.

The concept that radiowave propagation was affected by the atmosphere of the earth was discovered by ________.

In the purification of drinking water,the filtered water is made basic by adding ________,then particles and bacteria are captured by adding Al2(SO4)3.

In the past,CFCs were used in which of the following?

Nitrogen oxides catalytically destroy ozone.

What is the concentration (ppm)of helium in the atmosphere if the mole fraction of helium in dry air near sea level is 0.00000524?

How many liters of water does the average adult in the U.S.require?

Compounds found in fossil fuels that contain ________ are primarily responsible for acid rain.

CFC stands for ________.

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 C-Cl and C-F bond dissociation energies in CF₃Cl are 339 kJ/mol and 482 kJ/mol,respectively.The maximum wavelengths of electromagnetic radiation required to rupture these bonds are and ,respectively.

The dissociation energy of N₂ is 941 kJ/mol.The maximum wavelength of light that has enough energy per photon to dissociate the N₂ molecule is ________ nm.

The acidic water of a lake (V = 4 × 10⁸ L)must be neutralized with lime,CaO.It will require a minimum of ________ grams of lime to adjust the pH from 5.6 to 6.5.

The concentration of ozone in a sample of air that has a partial pressure of O₃ of 0.53 torr and a total pressure of air of 695 torr is ________ ppm.

The ionization energy of NO is 890 kJ/mol: NO + hv → NO⁺ + The maximum wavelength of light capable of causing the ionization of NO is ________ nm.

In the purification of drinking water,the filtered water is made basic by adding ________,then particles and bacteria are captured by adding Al₂(SO₄)_3.