42) What mass, in grams, of a 5.00% by mass sugar water solution is needed to supply 12.5 g of
sugar?
A) 125 g
B) 250 g
C) 132 g
D) 150 g
43) How many grams of alcohol are present in 2 bottles (992 g total mass of mixture) of an
alcohol/water mixture of that is 25.6% alcohol by mass?
A) 254 g alcohol
B) 366 g alcohol
C) 350 g alcohol
D) 210 g alcohol
44) In a laboratory class with 80 students, 50% of the students are male, and 10% of the male
students are left handed. How many students in the laboratory are male students that are left
handed?
A) 3 students
B) 8 students
C) 10 students
D) 4 students
45) Half-life is the time required for 50% of the compound to decay. If a 128 mg sample
undergoes 6 successive half-lives, how much sample will be left?
A) 32.0 mg
B) 16.0 mg
C) 4.0 mg
D) 2.0 mg
46) The accepted value for the boiling point of diethyl ether is 35 °C. What is the percent error
for a reported value of 36.1 °C as the boiling point of diethyl ether?
A) -3.1%
B) -8.6%
C) 5.7%
D) 3.1%
47) A student was asked to determine the density of magnesium metal by the volume of
displacement method. The student determined the density of magnesium as 1.89 g/mL. The
accepted value for the density of magnesium is 1.74 g/mL. Calculate the percent error associated
with the student’s reported density.
A) 8.6%
B) 7.9%
C) 92%
D) 86%
48) Which of the following statements concerning the three major temperature scales is
incorrect?
A) Kelvin temperatures always have positive values.
B) The freezing point of water has a lower numerical value on the Kelvin scale than on the
Fahrenheit scale.
C) The boiling point of water has a higher numerical value on the Fahrenheit scale than the
Celsius scale.
D) The boiling point of water has a higher numerical value on the Kelvin scale than the Celsius
scale.
49) A temperature change of 16.0 degrees Fahrenheit is equivalent to how many degrees change
on the Celsius temperature scale?
A) 8.89°
B) 18.7°
C) 2.56°
D) 5.76°
50) A temperature of 316 on the Kelvin scale is equivalent to ________.
A) 589 °C
B) 158 °C
C) 43 °C
D) 104 °C
51) A temperature change of 30 degrees on the Celsius scale is equal to how how much of a
change on the Kelvin scale?
A) 30 K
B) 303 K
C) 17 K
D) 243 K
52) If the temperature is 18 °C, then the reading on the Fahrenheit scale would be ________.
A) 40 °F
B) 64 °F
C) 38 °F
D) 12 °F
53) The surface temperature of the sun is 7530 °C. What is the surface temperature of the sun in
Kelvin?
A) 10,400 K
B) 273 K
C) 420 K
D) 7803 K
54) The temperature of an average lightning bolt is 3.0 x 104 °C. What is the equivalent
temperature on the Fahrenheit scale?
A) 5.4 x 104 °F
B) 6.9 x 105 °F
C) 1.7 x 104 °F
D) 3.8 x 103 °F
3.2 Short Answer
1) TRUE/FALSE: An astronaut whose mass is equal to 82 kg on Earth, on the Moon will
A) weigh much less due to the Moon’s decreased gravitational attraction.
B) weigh much more due to the Moon’s decreased gravitational attraction.
C) have the same mass on the Moon as on Earth.
2) Explain the difference between mass and weight.
3) The density of osmium, the densest metal known, is 2260 cg/cm3. A rectangular block of
osmium is depicted below. Calculate the mass of the block of osmium in pounds.
4) Calculate the volume of the sphere depicted below in cubic centimeters.
5) Using the dimensional analysis method of problem solving, carry out the following metric-
metric conversions:
A) 17.2 cm = ? m
B) 1.786 kg = ? μm
C) 257 mL = ? dL
D) 65 cm3 = ? km3
E) 3,634 mg = ? hg
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6) Using the dimensional analysis method of problem solving, carry out the following English-
metric or metric-English conversions:
A) 25.2 lb = ? mg
B) 4.2 gal = ? cL
C) 3.3 m = ? ft
D) 2.7 cm2 = ? in2
E) 0.650 mil = ? cm
7) Using the dimensional analysis method of problem solving, calculate the velocity, in yards per
second, that is equivalent to a velocity of 50.00 m/day.
8) A post-operative patient is to receive 250 mg of intravenous (IV) antibiotic every 4.00 hours.
A 1.00 liter bag of IV solution contains 1000 mg of antibiotic. What drop rate (in drops per
second) of IV solution is required for the patient to receive the correct dosage of antibiotic? (20
drops = 1 mL)
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9) During the summertime in Atlanta, the jet stream moves north towards Canada, and the
atmosphere often stagnates. Weather forecasters give daily ozone warnings to the elderly and to
people with asthma because ozone build-up in the air is harmful. Typically, an adult will inhale
2.1 liters of air per breath. What mass of ozone, in g, is taken into the lungs per breath by an
adult breathing air containing 3.64 x10-4 g of ozone per cubic centimeter (cm3) of air?
10) What is the capacity of a gasoline container, in gallons, if it will hold 96.5 lb of gasoline with
a density of 0.60 g/mL?
11) If the speed of a bullet being fired from a rifle is 2357 ft/sec, what is this in miles per hour?
12) The average person requires 2500 Calories per day to maintain normal body function.
Generally speaking, an average person gains one pound of body weight for every 3500 Calories
consumed beyond that required by the body. If an average person’s diet is 2700 Calories per day
for one year, how many pounds of body weight would the person gain during that year?
13) The cheetah is the fastest land animal on earth with a top speed of 70.0 miles per hour. What
is the top speed of a cheetah in meters per second?
14) The concentration of sugar in a solution is found to be 2.30 μg/L. What is the sugar
concentration in g/cm3?
15) The recommended adult dose of Elixophyllin, a drug used to treat asthma, is 9.0 mg/kg of
body mass. Calculate the dose in milligrams for a 185-lb. person.
16) What mass of gold (density = 19.3 g/cm3) occupies the same volume as 80.0 g of lithium
(density = 0.534 g/cm3)?
17) Using the dimensional analysis method of problem solving, calculate the number of green
brass buttons in a box containing 1365 buttons, if 36.2% of the buttons are brass and 18.1% of
18) A temperature of 354 on the Kelvin scale is equivalent to what temperature on the Fahrenheit
scale?
19) A hospital patient has an oral temperature of 39.5 °C and weighs 190 lb. He is to receive a
drug, the total dosage of which is 55 mg per kilogram of body weight.
A) What is his temperature in degrees Fahrenheit? In Kelvin?
B) What is his weight in kilograms?
C) What mass in milligrams of pure drug should he receive?
20) Perform the following conversions. Be sure to use proper significant figures in your answer.
You may use these conversion factors to help you.
1.61 km = 1 mile 2.54 cm = 1 in 1.06 qt = 1.0 L 454 g = 1 lb.
A) 86.7 km to miles
B) 65 in to mm
C) 82 °F to °C
D) 310 lb. to kg
21) A major league pitcher can throw a fastball at 43.0 m/sec. How fast is his fastball in miles
per hour?
22) Methane is a natural gas that is used in most homes. If it boils at 111 K what is this boiling
point in Celsius and Fahrenheit?