39) A 3.20 g sample of pyrite (density = 4.5 g /mL0) is placed into a graduated cylinder with 15.64 mL of
water. What will be the new volume of water?
A) 30.04
B) 14.93
C) 16.35
D) 0.71 mL
40) A piece of metal ore weighs 7.25 g. When a student places it into a graduated cylinder containing
water, the liquid level rises from 21.25 mL to 25.00 mL. What is the density of the ore?
A) 0.281 g/mL
B) 0.141 g/mL
C) 1.93 g/mL
D) 3.21 g/mL
41) A mass of mercury occupies 0.650 L. What volume would an equal mass of ethanol occupy? The
density of mercury is and the density of ethanol is 0.789 g/mL.
A) 0.0378 L
B) 0.650 L
C) 11.2 L
D) 5.00 L
42) Calculate the kinetic energy of a 150-g baseball moving at a speed of 38. m/s (85 mph).
A) 5.7 J
B) 1.1 × 102 J
C) 5.7 × 103 J
D) 1.1 × 105 J
43) The nutritional calorie (abbreviated Cal) is equal to
A) 1 mcal.
B) 4.184 J.
C) 4.184 Mcal.
D) 1 kcal.
44) Which is the largest amount of heat?
A) 547 cal
B) 8.32 × 102 kcal
C) 6.66 × 102 J
D) 4.33 kJ
45) Which of the following numbers has the greatest number of significant figures?
A) 0.8010
B) 0.504
C) 742000
D) 9.05 × 1024
46) How many of the following numbers contain 3 significant figures?
0.509 1.050 0.0500 1.06 × 1024
A) one
B) two
C) three
D) four
47) A methane molecule contains 1 atom of carbon. The number 1 represents how many significant
figures?
A) one
B) two
C) three
D) infinite
48) A student measured the diameter of a sphere and determined the average value. His measurements
are and If the true diameter is 6.18 cm, what can be said about the
student’s results?
A) It is accurate and precise.
B) It is accurate but not precise.
C) It is precise but not accurate.
D) It is neither precise nor accurate.
49) Which of the following numbers has the greatest number of significant figures?
A) 0.5070
B) 0.201
C) 234000
D) 3.69 × 1024
50) Which of the following is an exact number?
A) 0.0.369 grams
B) 9.25 liters
C) 4 oranges
D) 3.60°C
51) The measured mass of a sample of iron was 1.88 g. Which digit in the measurement has the least
certainty?
A) the first digit, 1
B) the middle digit, 8
C) the last digit, 8
D) They are all certain digits.
52) How many of the following numbers contain 3 significant figures?
0.105 5.600 0.0300 7.00 × 102
A) one
B) two
C) three
D) four
53) A heptane molecule contains 16 atoms of hydrogen. The number 16 represents how many significant
figures?
A) one
B) two
C) three
D) infinite
54) Consider the calculation:
Which of the following is the answer to this question with the correct number of significant digits?
A) 3
B) 3.0189
C) 3.019
D) 3.0
55) How many significant figures are there in the answer to the following problem?
(3.335 × 6.500) + 0.940 = ?
A) one
B) two
C) three
D) four
56) How many significant figures are there in the answer for the following problem?
23.1 + 0.5588 + 17 = ?
A) one
B) two
C) three
D) four
57) How many significant figures are there in the answer for the following problem?
= ?
A) one
B) two
C) three
D) four
58) How many significant figures are there in the answer for the following problem?
23.1 + 0.5848 + 11 = ?
A) one
B) two
C) three
D) four
59) Round off 00507506 to four significant figures.
A) 0051
B) 5076
C) 5100
D) 5.075 × 105
60) Round off 477,503 to four significant figures.
A) 4775
B) 4776
C) 4.775 × 105
D) 4.776 × 105
61) Round off 327,504 to three significant figures.
A) 327
B) 328
C) 3.27 × 105
D) 3.28 × 105
62) If 1.4% of the mass of a human body is calcium, how many kilograms of calcium are there in a 195–
pound man?
A) 1.2 kg Ca
B) 6.0 kg Ca
C) 1.2 × 102 kg Ca
D) 6.0 × 102 kg
63) A fishing boat accidentally spills 6.0 barrels of diesel oil into the ocean. Each barrel contains 42
gallons. If the oil film on the ocean is 2.5 × 102 nm thick, how many square meters will the oil slick cover?
A) 3.8 × 10-3 m2
B) 3.8 × 106 m2
C) 3.8 × 107 m2
D) none of these
64) Because of the high heat and low humidity in the summer in Death Valley, California, a visitor
requires about one quart of water for every two miles traveled on foot. Calculate the approximate
number of liters required for a person to walk 15 kilometers in Death Valley.
A) 4.4 L
B) 18 L
C) 46 L
D) 70 L
65) A car drives 80 km/h. If the car is driven for 122 minutes, how many miles has the car traveled?
A) 262
B) 364,000
C) 101
D) 24.4
66) The output of a pendant manufacturer is 4335 pounds per week. If each pendant weighs 0.0133
pounds, how many pendants does the manufacturer make in one day?
A) 2,282,000
B) 324,700
C) 58
D) 46,560
67) An atom can be seen by
A) an atomic force microscope.
B) a nucleon microscope.
C) an optical microscope.
D) a telescope.
68) Identify the smallest item.
A) the width of human hair
B) a white blood cell
C) a virus
D) a sugar
69) Liquids A, B, and C are insoluble in one another (i.e., they are immiscible). A, B, and C have densities
of and respectively. Which drawing represents the result of placing
all three liquids into the same graduated cylinder?
A) drawing (a)
B) drawing (b)
C) drawing (c)
D) drawing (d)
1.3 Short Answer Questions
1) Chemistry is the study of the composition, properties, and transformations of ________.
2) A preliminary explanation of the results of many experiments that can be used to make predictions and
suggest further experimentations is a ________.
3) Using exponential notation, there are ________ bytes of memory are contained in a 2 TB external hard
drive.
4) Using exponential notation, there are ________ g in 1.5 mg.
5) The fundamental SI unit of mass is the ________.
6) The meter is closest in length to the English system unit the ________.
7) The difference between the boiling point and freezing point of water is 100°C, which is ________
kelvins.
8) Volume is a derived unit having the unit lengthx, where x = ________.
9) The quantity 2.27 cm3 is the same as ________ mL.
10) The density of lead is 11.3 g/cm3. The volume occupied by 227 g of lead is ________ cm3.
11) The density of mercury is 13.6 g/cm3. The mass of 38.0 cm3 of mercury is ________ g.
12) Stored energy is ________ energy, and energy of motion is ________ energy.
13) The nutritionist unit Calorie is equal to ________ calories.
14) ________ refers to how well a number of independent measurements agree with one another, whereas
________ refers to how close to the true value a given measurement is.
15) The number of significant digits in 0.01810 g is ________.
16) The quantity 1.0857 qt rounded to two significant figures is ________ qt.
17) Given that 2.54 cm = 1 in, 350 in3 = ________ L.