Unlock document.
This document is partially blurred.
Unlock all pages and 1 million more documents.
Get Access
55. During a physics experiment, an electron is accelerated to 93 percent of the speed of light.
What is the speed of the electron in miles per hour? (speed of light = 3.00 108 m/s,
1 km = 0.6214 mi)
A)
mi/h
B)
mi/h
C)
mi/h
D)
mi/h
E)
mi/h
56. In the spring of 2008, petrol cost £1.179 per litre in London. On the same day, the exchange
rate was $1 = £0.493. What was the price of London petrol in dollars ($) per gallon? (1 gal =
3.7854 L)
A)
$4.46 /gal
B)
$2.20 /gal
C)
$9.05 /gal
D)
$1.58 /gal
E)
$7.68 /gal
57. For spring break you and some friends plan a road trip to a sunny destination that is 2105
miles away. If you drive a car that gets 33 miles per gallon and gas costs $3.199/gal, about
how much will it cost to get to your destination?
A)
$
B)
$
C)
$
D)
$
E)
$
58. Convert 7.9 kg to lb. (1 kg = 2.205 lb)
A)
17 lbs
B)
1.7 lbs
C)
3.6 lbs
D)
0.017 lbs
E)
17.42 lbs
2.8 108
6.2 1011
6.7 108
1.0 107
6.2 108
59. Manganese makes up 1.3 10–4 percent by mass of the elements found in a normal healthy
body. How many grams of manganese would be found in the body of a person weighing 206
lb? (2.205 lb = 1 kg)
A)
0.59 g
B)
0.12 g
C)
12 g
D)
59 g
E)
1.2 10–4 g
60. In 1928, 29.3 g of a new element was isolated from 660 kg of the ore molybdenite. The
percent by mass of this element in the ore was:
A)
44 %
B)
6.6 %
C)
29.3 %
D)
0.0044 %
E)
19.3 %
61. 409 Kelvin equals
A)
136°F
B)
273°F
C)
682°F
D)
136°C
E)
682°C
62. The melting point of a certain element is 391°C. What is this on the Fahrenheit scale?
A)
490°F
B)
249°F
C)
977°F
D)
736°F
E)
672°F
63. Convert: –48.2°C = ____________ °F.
A)
–86.8°F
B)
–119°F
C)
–54.8°F
D)
119°F
E)
64. As warm water sits in a cool room, you measure the temperature change
(T = Tfinal – Tinitial). Which of the following is true?
A)
The temperature change (T) is bigger if you are measuring in °F.
B)
The temperature change (T) is bigger if you are measuring in °C.
C)
The temperature change (T) will be the same regardless of the scale you use.
D)
Answer A or B is correct, depending on the difference in temperature between the
water and the room.
E)
None of the above.
65. The melting point of picolinic acid is 136.5°C. What is the melting point of picolinic acid on
the Fahrenheit scale?
A)
107.8°F
B)
245.7°F
C)
168.5°F
D)
409.5°F
E)
277.7°F
66. In 1984, some drums of uranium hexafluoride were lost in the English Channel, which is
known for its cold water (about 17°C). The melting point of uranium hexafluoride is 148°F.
In what physical state is the uranium hexafluoride in these drums?
A)
solid
B)
liquid
C)
gas
D)
a mixture of solid and liquid
E)
not enough information
67. The melting point of indium is 156.2°C. At 323°F, what is the physical state of indium?
A)
Solid.
B)
Liquid.
C)
Gas.
D)
Not enough information.
E)
At 323°F, the indium is partially solid and partially liquid; there is an equilibrium
between the two states.
68. On a new temperature scale (°Z), water boils at 120.0°Z and freezes at 40.0°Z. Calculate the
normal human body temperature using this temperature scale. On the Celsius scale, normal
human body temperature could typically be 37.1°C, and water boils at 100.0°C and freezes
at 0.00°C.
A)
2968°Z
B)
12.4°Z
C)
D)
111°Z
E)
29.7°Z
69. The calibration points for the linear Reaumur scale are the usual melting point of ice and
boiling point of water, which are assigned the values 0°R and 80°R, respectively. The
boiling point of ethanol is 78.4°F. What is this temperature in °R?
A)
158.4°R
B)
C)
D)
208.4°R
E)
20.6°R
70. A monolayer containing g of oleic acid has an area of 20.0 cm2. The density of
oleic acid is 0.895 g / mL. What is the thickness of the monolayer (the length of an oleic
acid molecule)?
A)
cm
B)
cm
C)
cm
D)
cm
E)
cm
71. The density of gasoline is 0.7025 g/mL at 20°C. When gasoline is added to water:
A)
It will float on top.
B)
It will sink to the bottom.
C)
It will mix so, you can't see it.
D)
The mixture will improve the running of the motor.
E)
None of these things will happen.
72. A piece of zinc with a mass of 12.14 g is submerged in 46.3 cm3 of water in a graduated
cylinder. The water level increases to 48.0 cm3. The correct value for the density of zinc
from these data is:
A)
7.141
B)
7.1
C)
0.14
D)
0.253
E)
3.95
73. If volume of liquid is plotted along the horizontal axis, and total mass of beaker plus liquid
is plotted on the vertical axis:
A)
The x, or horizontal, intercept is the negative value of the weight of the beaker.
B)
The y, or vertical, intercept is the weight of the empty beaker.
C)
The slope of the line is 1.0.
D)
The line will pass through the origin.
E)
The slope of the line is independent of the identity of the liquid.
74. Considering the plot of total mass (y-axis) versus volume (x-axis), which of the following is
true?
A)
The plot should be rather linear because the slope measures the density of a liquid.
B)
The plot should be curved upward because the slope measures the density of a
liquid.
C)
The plot should be curved upward because the mass of the liquid is higher in
successive trials.
D)
The plot should be linear because the mass of the beaker stays constant.
E)
None of the above.
75. A 20.0 mL sample of glycerol has a mass of 25.2 grams. What is the mass of a 57-mL
sample of glycerol?
A)
8.8 g
B)
45 g
C)
g
D)
72 g
E)
71.8 g
76. Suppose that you purchased a water bed with the dimensions 2.55 m 2.53 dm 235 cm.
What mass of water does this bed contain?
A)
g
B)
g
C)
g
D)
g
E)
g
2.9 104
1.52 103
1.52 104
1.52 105
1.52 108
1.52 106
77. A freighter carrying a cargo of uranium hexafluoride sank in the English Channel in late
August 1984. The cargo of uranium hexafluoride weighed kg and was
contained in 30 drums, each containing L of UF6. What is the density (g/mL) of
uranium hexafluoride?
A)
1.53 g/mL
B)
5.11 g/mL
C)
2.25 g/mL
D)
0.196 g/mL
E)
51.1 g/mL
78. The boiling of water is a
A)
physical change because the water merely disappears
B)
physical change because the gaseous water is chemically the same as the liquid
C)
chemical change because heat is needed for the process to occur
D)
chemical change because a gas (steam) is given off
E)
chemical and physical damage
79. The state of matter for an object that has a definite volume but not a definite shape is
A)
solid state
B)
liquid state
C)
gaseous state
D)
elemental state
E)
mixed state
80. The state of matter for an object that has both definite volume and definite shape is
A)
solid state
B)
liquid state
C)
gaseous state
D)
elemental state
E)
mixed state
81. _________ are substances with constant composition that can be broken down into elements
by chemical processes.
A)
Solutions
B)
Mixtures
C)
Compounds
D)
Quarks
E)
Heterogeneous mixtures
82. A method of separation that employs a system with two phases of matter, a mobile phase
and a stationary phase, is called
A)
filtration
B)
chromatography
C)
distillation
D)
vaporization
E)
homogenization
83. Which of the following statements is false?
A)
Solutions are always homogeneous mixtures.
B)
The terms “atom” and “element” can have different meanings.
C)
Elements can exist as atoms or molecules.
D)
Compounds can exist as atoms or molecules.
E)
At least two of the above statements (A-D) are false.
84. An example of a pure substance is
A)
elements
B)
compounds
C)
pure water
D)
carbon dioxide
E)
all of these
85. A solution is also called a
A)
homogeneous mixture
B)
heterogeneous mixture
C)
pure mixture
D)
compound
E)
distilled mixture
Consider the following choices when answering questions 86-89.
86. Which best represents a homogeneous mixture of an element and a compound?
A)
option a
B)
option b
C)
option c
D)
option d
E)
option e
87. Which best represents a gaseous compound?
A)
option a
B)
option b
C)
option c
D)
option d
E)
option e
88. Which best represents a solid element?
A)
option a
B)
option b
C)
option c
D)
option d
E)
option e
89. Which best represents a heterogeneous mixture of two elements?
A)
option a
B)
option b
C)
option c
D)
option d
E)
option e
90. All physical changes are accompanied by chemical changes.
91. Color changes always indicate a chemical change.
92. What are the components of the scientific method?
93. Garfield (weighing 24 lbs) took a flight to the moon on the space shuttle. As usual, he
stuffed himself with lasagna during the entire flight and napped when he wasn't eating.
Much to his delight when he got to the moon he found he weighed only 6 lbs. He
immediately proclaimed a quick weight loss diet. Explain the fallacy in his reasoning.
Assume gravity on the moon to be about one-sixth that of Earth.
94. Contrast the terms precision and accuracy.
95. What data would you need to estimate the money you would spend on gas to drive your car
from Los Angeles to Chicago? Provide a sample calculation.
96. On a new temperature scale (°Y), water boils at 155.0°Y and freezes at 0.00°Y. Calculate
the normal human body temperature using this temperature scale. On the Fahrenheit scale,
normal human body temperature is 98.6°F, and water boils at 212.0°F and freezes at 32.0°F.
97. Explain how Archimedes might have used the concept of density to determine whether the
king's crown was pure gold. (density of gold = 19.32 g/cm3)
98. Explain the main differences between a compound and a mixture.
99. Give three physical methods used by chemists to separate mixtures and identify the type of
mixture best suited for each process.
100. Name three methods for the separation of mixtures.
