Final Exam Practice 3
1. Which sample of CO 2 has a definite shape and a definite
volume?
A) CO 2(aqeous)
C) CO 2( iquid)
B) CO 2(gas)
D) CO 2(solid)
2. An example of a physical property of an element is the
element's ability to
A) react with an acid
C) burn in air
B) react with oxygen
D) melt
3. Which statement describes a chemical property of
hydrogen gas?
A)
B)
C)
D)
Hydrogen gas burns in air.
Hydrogen gas is colorless.
Hydrogen gas has a density of 0.000 09g/cm 3.
Hydrogen gas boils at 20 deg C.
4. At STP, which physical property of aluminum always
remains the same from sample to sample?
A) mass
C) length
6. Which equation represents a physical change?
A)
B)
C)
D)
H 2O(s) + 6.01 kJ ® H 2O( )
2H2(g) + O 2(g) ® 2H2O(g) + 483.6 kJ
H2(g) + I 2(g) + 53.0 kJ ® 2HI(g)
N2(g) + 2O 2(g) + 66.4 kJ ® 2NO 2(g)
7. Which property is a measure of the average kinetic
energy of the particles in a sample of matter?
A) mass
C) pressure
B) density
D) temperature
8. Which statement defines the temperature of a sample of
matter?
A) Temperature is a measure of the total
electromagnetic energy of the particles.
B) Temperature is a measure of the total thermal
energy of the particles.
C) Temperature is a measure of the average potential
energy of the particles.
D) Temperature is a measure of the average kinetic
energy of a particles.
B) density
D) volume
9. What is the total amount of heat required to vaporize
1.00 gram of H2O( ) at 100.°C and 1 atmosphere?
5. Which statement describes a chemical property of
aluminum?
A)
B)
C)
D)
Aluminum is malleable.
Aluminum reacts with sulfuric acid.
Aluminum conducts an electric current.
Aluminum has a density of 2.698 g/cm 3 at STP.
A) 4.18 J
C) 373 J
B) 334 J
D) 2260 J
10. Which process is exothermic?
A)
B)
C)
D)
boiling of water
melting of copper
condensation of ethanol vapor
sublimation of iodine
Final Exam Practice 3
11. Which phase change is accompanied by the release of
heat?
A) H2O(s) ® H2O(g) B) H2O(s) ® H2O( )
C) H2O( ) ® H2O(g) D) H 2O( ) ® H 2O(s)
12. Which physical changes are endothermic?
A)
B)
C)
D)
melting and freezing
melting and vaporization
condensation and sublimation
condensation and deposition
13. The graph below represents the relationship between time and temperature as heat is added at a constant
rate to a sample of a substance.
During interval AB which energy change occurs for the particles in this sample?
A)
B)
C)
D)
The potential energy of the particles increases.
The potential energy of the particles decreases.
The average kinetic energy of the particles increases.
The average kinetic energy of the particles decreases.
Final Exam Practice 3
14. Given the cooling curve of a substance:
16. The temperature of a sample of water changes from
10°C to 20°C when the sample absorbs 418 joules of
heat. What is the mass of the sample?
A) 1 g
C) 100 g
During which intervals is potential energy decreasing
and average kinetic energy remaining constant?
A) AB and BC
C) DE and BC
B) AB and CD
D) DE and EF
15. Given the diagram representing a heating curve for a
substance:
B) 10 g
D) 1000 g
17. The temperature of a sample of water changes from
10.°C to 20.°C when the water absorbs 420 Joules of
heat. What is the mass of the sample?
A) 1.0 g
C) 100 g
B) 10. g
D) 1000 g
18. When 200 grams of water cools from 50.°C to 25°C,
the total amount of heat energy released by the water is
A) 42 kJ B) 21 kJ C) 34 J
D) 17 J
19. What is the minimum amount of heat required to
completely melt 20.0 grams of ice at its melting point?
A) 20.0 J
C) 6,680 J
B) 83.6 J
D) 45,200 J
20. Which statement describes the transfer of heat energy
that occurs when an ice cube is added to an insulated
container with 100 milliliters of water at 25°C?
During which time interval is the average kinetic
energy of the particles of the substance constant while
the potential energy of the particles increases?
A) AC
B) BC
C) CD
D) DF
A) Both the ice cube and the water lose heat energy.
B) Both the ice cube and the water gain heat energy.
C) The ice cube gains heat energy and the water
loses heat energy.
D) The ice cube loses heat energy and the water gains
heat energy.
Final Exam Practice 3
21. What amount of heat is required to completely melt a
29.95-gram sample of H 2O(s) at 0°C?
A) 334 J
C) 1.00 × 10 3 J
B) 2260 J
D) 1.00 × 10 4 J
26. Two grams of sodium chloride are completely
dissolved in a sample of water in a beaker. This
solution is classified as
A)
B)
C)
D)
an element
a compound
a homogeneous mixture
a heterogeneous mixture
22. In which equation does the term "heat" represent heat
of fusion?
A) NaCl(s) + heat
NaCl( )
B) NaOH(aq) + HCl(aq)
NaCl(aq) + H 2O( ) +
heat
C) H2O( ) + heat
H2O(g)
D) H2O( ) + HCl(g)
H3O+ (aq) + Cl–(aq) + heat
23. Which phase change is endothermic?
A) H 2O( ) ® H 2O(g) B) I 2(g) ® I 2(s)
C) Hg( ) ® Hg(s)
D) H2S(g) ® H2S( )
24. How much energy is required to vaporize 10.00 grams
of water at its boiling point?
A) 2.26 kJ
C) 4.2 kJ
B) 3.34 kJ
D) 22.6 kJ
25. The heat of vaporization of a liquid is 1,340 Joules per
gram. What is the minimum number of Joules needed
to change 40.0 grams of the liquid to vapor at the
boiling point?
A) 33.5
C) 3,280
B) 1,340
D) 53,600
27. Which formula represents a mixture?
A) C6H12O6( )
C) LiCl(aq)
B) C6H12O6(s)
D) LiCl(s)
28. A mixture of crystals of salt and sugar is added to water
and stirred until all solids have dissolved. Which
statement best describes the resulting mixture?
A) The mixture is homogeneous and can be separated
by filtration.
B) The mixture is homogeneous and cannot be
separated by filtration.
C) The mixture is heterogeneous and can be separated
by filtration.
D) The mixture is heterogeneous and cannot be
separated by filtration.
29. Which of these contains only one substance?
A) distilled water
C) saltwater
B) sugar water
D) rainwater
30. Which of these terms refers to matter that could be
heterogeneous?
A) element
C) compound
B) mixture
D) solution
Final Exam Practice 3
31. At room temperature, a mixture of sand and water can
be separated by
A) ionization
C) filtration
B) combustion
D) sublimation
36. Compared to the charge of a proton, the charge of an
electron has
A)
B)
C)
D)
a greater magnitude and the same sign
a greater magnitude and the opposite sign
the same magnitude and the same sign
the same magnitude and the opposite sign
32. A dry mixture of KNO3 and sand could be separated by
A)
B)
C)
D)
adding water to the mixture and filtering
adding water to the mixture and evaporating
heating the mixture to a high temperature
cooling the mixture to a low temperature
33. If a student pours a mixture of sand and salt water
through a filter paper into a beaker, what will be found
in the beaker after filtering?
A) salt, only
C) salt and water
B) sand, only
D) salt and sand
34. Which subatomic particles are located in the nucleus of
an Helium-4 atom?
A)
B)
C)
D)
electrons and neutrons
electrons and protons
neutrons and protons
neutrons, protons, and electrons
35. According to the modern model of the atom, the
nucleus of an atom is surrounded by one or more
A) electrons
C) positrons
B) neutrons
D) protons
37. What is the overall charge of an ion that has 12 protons,
10 electrons, and 14 neutrons?
A) 2–
B) 2+
C) 4–
D) 4+
38. An atom of lithium-7 has an equal number of
A)
B)
C)
D)
electrons and neutrons
electrons and protons
positrons and neutrons
positrons and protons
39. A neutral atom of any element must contain
A)
B)
C)
D)
an equal number of protons and neutrons
an equal number of protons and electrons
more electrons than neutrons
more electrons than protons
40. All phosphorus atoms have the same
A)
B)
C)
D)
atomic number
mass number
number of neutrons plus the number of electrons
number of neutrons plus the number of protons
Final Exam Practice 3
41. Which quantity represents the number of protons in an
atom?
A)
B)
C)
D)
atomic number
oxidation number
number of neutrons
number of valence electrons
43. Which particle has the least mass?
A) alpha particle
C) neutron
B) beta particle
D) proton
44. Which particle has the least mass?
A)
B)
C)
10n
D)
0 -1 e
42. Every chlorine atom has
A)
B)
C)
D)
7 electrons
17 neutrons
a mass number of 35
an atomic number of 17
45. What is the mass number of a carbon atom that contains
six protons, eight neutrons, and six electrons?
A) 6
B) 8
C) 14
D) 20
Answer Key
Final Ex Practice 2
1.
D
37.
B
2.
D
38.
B
3.
A
39.
B
4.
B
40.
A
5.
B
41.
A
6.
A
42.
D
7.
D
43.
B
8.
D
44.
D
9.
D
45.
C
10.
C
11.
D
12.
B
13.
A
14.
C
15.
B
16.
B
17.
B
18.
B
19.
C
20.
C
21.
D
22.
A
23.
A
24.
D
25.
D
26.
C
27.
C
28.
B
29.
A
30.
B
31.
C
32.
A
33.
C
34.
C
35.
A
36.
D