Question 1

The mole fraction of nitrogen in dry air near sea level is 0.78084, where the molar mass of nitrogen is 28.013. The partial pressure of nitrogen when the total atmospheric pressure (dry air)is 97.5 kPa is ________ kPa.

Accepted Answer

A) 126 
B) 4.51 
C) 77.0 
D) 2.16 × 103 
E) 2.75

Question 2

Clean rainwater is acidic mainly due to the presence of ________.

Accepted Answer

The answer of Clean rainwater is acidic mainly due to...

Question 3

List two of the three major sources of nitrogen and phosphorus in water.

Accepted Answer

The answer of List two of the three major sources...

Question 4

The concentration of a gas is 3.18 × 103 ppm at in a container where its partial pressure is 0.591 torr. The total pressure inside the container must be

Accepted Answer

A) 1.86 × 10-10 
B) 5.38 × 10-3 
C) 1.86 × 10-4 
D) 1.88 × 103 
E) 1.88 × 109

Question 5

Which one of the following is a source of carbon dioxide in the troposphere?

Accepted Answer

A) natural gas seepage 
B) electrical discharges 
C) fossil-fuel combustion 
D) volcanic gases 
E) forest fires

Question 6

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 7

What is the final stage in municipal water treatment?

Accepted Answer

A) treatment with ozone or chlorine 
B) course filtration through a screen 
C) addition of CaO/Al2(SO4)3 and settling 
D) sand bed filtration 
E) aeration

Question 8

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

Question 9

The main ionic constituent of sea water is ________.

Accepted Answer

A) Na+ 
B) Cl- 
C) SO42- 
D) Mg2+ 
E) Ca2+

Question 10

Most fresh water in the U.S. is used for agriculture.

Accepted Answer

A) True 
 B)False

Question 11

The bond energy of oxygen is higher than that of nitrogen.

Accepted Answer

A) True 
 B)False

Question 12

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

Question 13

A sample of air from a home is found to contain 7.2 ppm of carbon monoxide. This means that if the total pressure is 695 torr, then the partial pressure of CO is ________ torr.

Accepted Answer

A) 5.0 × 103 
B) 5.0 × 10-3 
C) 5.0 
D) 1.0 × 104 
E) 9.7 × 107

Question 14

Which process in the Global Water Cycle involves the phase transition H2O (l)→ H2O (g)?

Accepted Answer

A) evaporation from fresh water 
B) fog drip 
C) plant uptake 
D) freshwater storage 
E) snowmelt runoff to streams

Question 15

Nitric oxide arises from auto emissions and reacts with oxygen to produce ________ which reacts with sunlight to produce ________ atoms which react with oxygen to produce ________.

Accepted Answer

The answer of Nitric oxide arises from auto emissions and...

Question 16

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+

Question 17

Which one of the following substances found in the atmosphere will absorb radiation in the infrared portion of the spectrum?

Accepted Answer

A) N2 
B) O2 
C) Kr 
D) H2O 
E) He

Question 18

Which of the following is (are)not a typical source of nitric oxide?

Accepted Answer

A) livestock emissions 
B) atmospheric electrical discharges 
C) internal combustion engines 
D) combustion of organic matter 
E) all of the above

Question 19

Ozone is more efficient at killing bacteria in water, yet chlorine is used more commonly for that purpose in municipal water treatment. Why?

Accepted Answer

The answer of Ozone is more efficient at killing bacteria...

Question 20

In the reactions involved in the photodecomposition of ozone (shown below), what does M symbolize? 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) mesosphere 
B) metal 
C) molybdenum 
D) methane 
E) molecule

Exam 18: Chemistry of the Environment

The mole fraction of nitrogen in dry air near sea level is 0.78084, where the molar mass of nitrogen is 28.013. The partial pressure of nitrogen when the total atmospheric pressure (dry air) is 97.5 kPa is ________ kPa.

Clean rainwater is acidic mainly due to the presence of ________.

List two of the three major sources of nitrogen and phosphorus in water.

The concentration of a gas is 3.18 × 10³ ppm at in a container where its partial pressure is 0.591 torr. The total pressure inside the container must be

Which one of the following is a source of carbon dioxide in the troposphere?

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

What is the final stage in municipal water treatment?

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 main ionic constituent of sea water is ________.

Most fresh water in the U.S. is used for agriculture.

The bond energy of oxygen is higher than that of nitrogen.

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.

A sample of air from a home is found to contain 7.2 ppm of carbon monoxide. This means that if the total pressure is 695 torr, then the partial pressure of CO is ________ torr.

Which process in the Global Water Cycle involves the phase transition H₂O (l) → H₂O (g) ?

Nitric oxide arises from auto emissions and reacts with oxygen to produce which reacts with sunlight to produce atoms which react with oxygen to produce .

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

Which one of the following substances found in the atmosphere will absorb radiation in the infrared portion of the spectrum?

Which of the following is (are) not a typical source of nitric oxide?

Ozone is more efficient at killing bacteria in water, yet chlorine is used more commonly for that purpose in municipal water treatment. Why?

In the reactions involved in the photodecomposition of ozone (shown below) , what does M symbolize? 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)

Exam 18: Chemistry of the Environment

The mole fraction of nitrogen in dry air near sea level is 0.78084, where the molar mass of nitrogen is 28.013. The partial pressure of nitrogen when the total atmospheric pressure (dry air) is 97.5 kPa is ________ kPa.

Clean rainwater is acidic mainly due to the presence of ________.

List two of the three major sources of nitrogen and phosphorus in water.

The concentration of a gas is 3.18 × 103 ppm at in a container where its partial pressure is 0.591 torr. The total pressure inside the container must be

Which one of the following is a source of carbon dioxide in the troposphere?

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

What is the final stage in municipal water treatment?

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 main ionic constituent of sea water is ________.

Most fresh water in the U.S. is used for agriculture.

The bond energy of oxygen is higher than that of nitrogen.

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.

A sample of air from a home is found to contain 7.2 ppm of carbon monoxide. This means that if the total pressure is 695 torr, then the partial pressure of CO is ________ torr.

Which process in the Global Water Cycle involves the phase transition H2O (l) → H2O (g) ?

Nitric oxide arises from auto emissions and reacts with oxygen to produce ________ which reacts with sunlight to produce ________ atoms which react with oxygen to produce ________.

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

Which one of the following substances found in the atmosphere will absorb radiation in the infrared portion of the spectrum?

Which of the following is (are) not a typical source of nitric oxide?

Ozone is more efficient at killing bacteria in water, yet chlorine is used more commonly for that purpose in municipal water treatment. Why?

In the reactions involved in the photodecomposition of ozone (shown below) , what does M symbolize? 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)

The concentration of a gas is 3.18 × 10³ ppm at in a container where its partial pressure is 0.591 torr. The total pressure inside the container must be

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 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.

Which process in the Global Water Cycle involves the phase transition H₂O (l) → H₂O (g) ?

Nitric oxide arises from auto emissions and reacts with oxygen to produce which reacts with sunlight to produce atoms which react with oxygen to produce .

In the reactions involved in the photodecomposition of ozone (shown below) , what does M symbolize? 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)