EXAM 1 CHEM1100 SS10 ver1 by o3647G7

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									EXAM 1 CHEM 1100 SS10
Version #1


Student: ___________________________________________________________________________

1. Which substance is not considered to be an air pollutant?
A. N2
B. SO2
C. NO2
D. O3

2. The nucleus of an atom contains
A. electrons and protons only.
B. protons only.
C. electrons, protons, and neutrons.
D. protons and neutrons only.

3. Which contributes to the ozone hole?
A. automobile exhaust
B. chlorofluorocarbons (CFCs)
C. loss of Northern forests
D. All of these choices are correct.


4. Which diagram(s) best represent(s) only individual atoms?




A.   I only
B.   II only
C.   III only
D.   IV only
E.   II and III only

5. Which process does not involve a chemical change?
A. burning charcoal on the grill
B. digesting food
C. boiling water
D. cleaning the shower with Lime Away'
6. How many protons, neutrons, and electrons are there in the neutral atom of   ?




A. A
B. B
C. C
D. D

7. Isotopes of an element have the same number of ______, but different numbers of ______.
A. electrons; protons
B. protons; neutrons
C. neutrons; protons
D. protons; electrons

8. What is the effect of infrared energy on matter?
A. It excites bonding electrons.
B. It increases molecular rotation.
C. It breaks chemical bonds.
D. It increases the vibration of chemical bonds.


9. Ethanol (C2H6O) is a common intoxicant and fuel produced from the fermentation of various grains. How
many moles of ethanol are represented by 50.0 kg of ethanol?
A. 1.09  103 mol
B. 46.1 mol
C. 9.00 mol
D. 1.09 mol

10. Air is a(n)
A. element.
B. compound.
C. mixture.
D. pure substance.


11. The two chemical bonds and geometry of water are best represented by:
A.
B.

C.


D.
12. The ________ concentration in the air over the desert differs dramatically from that in the air in the tropical
rainforest.
A. N2
B. O2
C. CO2
D. H2O

13. The name of the compound formed by combining carbon atoms (             ) with oxygen atoms (      ) to
form           is
A. carbon oxide.
B. monocarbon dioxide.
C. carbon dioxide.
D. carbonate.


14. On a Periodic Table, the columns of elements with similar properties are
A. periods.
B. groups.
C. rows.
D. metals.

15. Which is correct?
A. Ozone forms by combining an oxygen atom with an oxygen molecule.
B. There is a dynamic steady state of ozone in the stratosphere.
C. UV radiation will dissociate ozone into an oxygen atom and an oxygen molecule.
D. All of these choices are correct.


16. Decreased stratospheric ozone concentrations may lead to
A. increased incidences of melanomas.
B. a decreased production of crops such as wheat, sorghum, and peas.
C. an increased occurrence of cataracts.
D. All of these choices are correct.

17. Ozone in our atmosphere is important because it
A. absorbs some UV radiation.
B. helps trees grow.
C. reacts with excess CO2.
D. reflects IR radiation.


18. Argon, which comprises almost 1% of the atmosphere, is approximately 27 times more abundant than CO2,
but does not contribute to global warming. Which explanation accounts for this fact?
A. Single atoms do not vibrate.
B. Argon's vibrational energy is not excited by infrared radiation.
C. Argon atoms are concentrated too high in the troposphere to interact with the earth's radiant energy.
D. Argon is not an anthropogenic pollutant.
19. Which substance is an element?
A. NO2
B. NaCl
C. N2
D. CH4

20. Which is one of the Lewis dot structures for ozone?
A.
B.
C.
D.


21. Which component of the air is an element?
A. H2O
B. NO2
C. O3
D. CO2

22. Choose the proper coefficients for each substance to balance this equation.

____ C2H4(g) + ____ O2(g)  ____ CO2(g) + ____ H2O(g)

A. 1, 1, 2, 2
B. 1, 3, 2, 2
C. 2, 3, 4, 2
D. 2, 2, 4, 2

23. The speed of light in air
A. depends only on the frequency of the light.
B. depends only on the wavelength of light.
C. is independent of the wavelength and frequency of light.
D. depends on both the wavelength and the frequency of light.
EXAM 1 CHEM 1100 SS10 Key
Version #1




1. Which substance is not considered to be an air pollutant?
A. N2
B. SO2
C. NO2
D. O3


American - 001 Chapter... #10



2. The nucleus of an atom contains
A. electrons and protons only.
B. protons only.
C. electrons, protons, and neutrons.
D. protons and neutrons only.


American - 002 Chapter... #23



3. Which contributes to the ozone hole?
A. automobile exhaust
B. chlorofluorocarbons (CFCs)
C. loss of Northern forests
D. All of these choices are correct.


American - 002 Chapter... #13



4. Which diagram(s) best represent(s) only individual atoms?




A.   I only
B.   II only
C.   III only
D.   IV only
E.   II and III only


American - 001 Chapter... #49
5. Which process does not involve a chemical change?
A. burning charcoal on the grill
B. digesting food
C. boiling water
D. cleaning the shower with Lime Away'


American - 001 Chapter... #33




6. How many protons, neutrons, and electrons are there in the neutral atom of   ?




A. A
B. B
C. C
D. D


American - 002 Chapter... #31



7. Isotopes of an element have the same number of ______, but different numbers of ______.
A. electrons; protons
B. protons; neutrons
C. neutrons; protons
D. protons; electrons


American - 002 Chapter... #27



8. What is the effect of infrared energy on matter?
A. It excites bonding electrons.
B. It increases molecular rotation.
C. It breaks chemical bonds.
D. It increases the vibration of chemical bonds.


American - 003 Chapter... #29
9. Ethanol (C2H6O) is a common intoxicant and fuel produced from the fermentation of various grains. How
many moles of ethanol are represented by 50.0 kg of ethanol?
A. 1.09  103 mol
B. 46.1 mol
C. 9.00 mol
D. 1.09 mol


American - 003 Chapter... #26



10. Air is a(n)
A. element.
B. compound.
C. mixture.
D. pure substance.


American - 001 Chapter... #9



11. The two chemical bonds and geometry of water are best represented by:
A.
B.

C.


D.


American - 002 Chapter... #42



12. The ________ concentration in the air over the desert differs dramatically from that in the air in the tropical
rainforest.
A. N2
B. O2
C. CO2
D. H2O


American - 001 Chapter... #7
13. The name of the compound formed by combining carbon atoms (          ) with oxygen atoms (   ) to
form          is
A. carbon oxide.
B. monocarbon dioxide.
C. carbon dioxide.
D. carbonate.


American - 001 Chapter... #54



14. On a Periodic Table, the columns of elements with similar properties are
A. periods.
B. groups.
C. rows.
D. metals.


American - 001 Chapter... #30



15. Which is correct?
A. Ozone forms by combining an oxygen atom with an oxygen molecule.
B. There is a dynamic steady state of ozone in the stratosphere.
C. UV radiation will dissociate ozone into an oxygen atom and an oxygen molecule.
D. All of these choices are correct.


American - 002 Chapter... #5



16. Decreased stratospheric ozone concentrations may lead to
A. increased incidences of melanomas.
B. a decreased production of crops such as wheat, sorghum, and peas.
C. an increased occurrence of cataracts.
D. All of these choices are correct.


American - 002 Chapter... #47



17. Ozone in our atmosphere is important because it
A. absorbs some UV radiation.
B. helps trees grow.
C. reacts with excess CO2.
D. reflects IR radiation.


American - 002 Chapter... #14
18. Argon, which comprises almost 1% of the atmosphere, is approximately 27 times more abundant than CO2,
but does not contribute to global warming. Which explanation accounts for this fact?
A. Single atoms do not vibrate.
B. Argon's vibrational energy is not excited by infrared radiation.
C. Argon atoms are concentrated too high in the troposphere to interact with the earth's radiant energy.
D. Argon is not an anthropogenic pollutant.


American - 003 Chapter... #37



19. Which substance is an element?
A. NO2
B. NaCl
C. N2
D. CH4


American - 001 Chapter... #44



20. Which is one of the Lewis dot structures for ozone?
A.
B.
C.
D.


American - 002 Chapter... #34



21. Which component of the air is an element?
A. H2O
B. NO2
C. O3
D. CO2


American - 001 Chapter... #8
22. Choose the proper coefficients for each substance to balance this equation.
____ C2H4(g) + ____ O2(g)  ____ CO2(g) + ____ H2O(g)
A. 1, 1, 2, 2
B. 1, 3, 2, 2
C. 2, 3, 4, 2
D. 2, 2, 4, 2


American - 001 Chapter... #56



23. The speed of light in air
A. depends only on the frequency of the light.
B. depends only on the wavelength of light.
C. is independent of the wavelength and frequency of light.
D. depends on both the wavelength and the frequency of light.


American - 002 Chapter... #10
EXAM 1 CHEM 1100 SS10 Summary

        Category            # of Questions
American - 001 Chapter...        10
American - 002 Chapter...        10
American - 003 Chapter...         3

								
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