Chapter 01 – Chemistry: The Study of Change
47. How many significant figures does the result of the following sum contain?
8.520 + 2.7
48. How many significant figures does the difference 218.7201 – 218.63 contain?
Chapter 01 – Chemistry: The Study of Change
49. Using the arithmetic problem below, determine the correct number of significant figures.
(1.5 10–4 61.3) + 2.01 =
50. Give the correct number of significant figures to the problem below.
2.4 x 10-4 + 3.1 x 10-2 =
Chapter 01 – Chemistry: The Study of Change
51. Give the correct number of significant figures to the problem below.
5.80 x 10-1 – 3.4 x 10-2 =
52. Give the correct number of significant figures to the problem below.
Chapter 01 – Chemistry: The Study of Change
53. Give the correct number of significant figures to the problem below.
6.2 x 10–13 x 5.68 x 108 =
54. Convert 2.340 x 10-4 to decimal format.
55. Convert 4.5 x 104 to decimal format.
Chapter 01 – Chemistry: The Study of Change
56. Convert 5.00 x 102 milliliters to quarts. (1L = 1.06 qt)
57. 1 US barrel = 4.21 cubic feet. Express this volume in liters.
58. 1 barrel of oil contains 42.0 gallons. How many liters is this? (1L = 1.06 qt)
Chapter 01 – Chemistry: The Study of Change
59. The average distance from Earth to the sun is 9.3 107 miles. How many kilometers is
this?
60. What is the area, in square centimeters, of an 8.5 inch by 11 inch sheet of paper?
Chapter 01 – Chemistry: The Study of Change
61.
Suppose a house has a floor area of 2,250 square feet. What is this area in units of square centimeters?
62. What is the volume, in cubic inches, of a brick that is 4.0 in 2.7 in 8.0 in?
Chapter 01 – Chemistry: The Study of Change
64. How many square kilometers are equivalent to 28.5 cm2?
Chapter 01 – Chemistry: The Study of Change
65.
If a car has an EPA mileage rating of 30 miles per gallon, what is this rating in kilometers per liter? (1 L = 1.06 qt)
66. If the price of gasoline is $3.85 per U.S. gallon, what is the cost per liter? (1 L = 1.06 qt)
Chapter 01 – Chemistry: The Study of Change
67.
An aluminum beverage can contain 12.0 fluid ounces of liquid. Express this volume in liters. 1 fl oz = 29.6 mL)
68.
1.572 108 troy oz of silver were used in the United States in 1980. How many kilograms is this? (1 troy oz = 31.1 g)
Chapter 01 – Chemistry: The Study of Change
69.
A piece of metal with a mass of 611 g is placed into a graduated cylinder that contains 25.1 mL of water, raising the water
level to 56.7 mL. What is the density of the metal?
70.
A piece of a metal alloy with a mass of 114 g was placed into a graduated cylinder that contained 25.0 mL of water, raising
the water level to 42.5 mL. What is the density of the metal?
Chapter 01 – Chemistry: The Study of Change
71.
A block of iron has a mass of 826 g. What is the mass of a block of magnesium that has the same volume as the block of
iron? The following densities at 25C are provided: agnesium, 1.7 g/cm3 ; graphite, 1.8 g/cm3 ; iron, 7.9 g/cm3.
72.
A block of iron has a mass of 483 g. What is the mass of a block of graphite that has the same volume as the block of iron?
The following densities at 25C are provided: agnesium, 1.7 g/cm3 ; graphite, 1.8 g/cm3 ; iron, 7.9 g/cm3.
Chapter 01 – Chemistry: The Study of Change
73.
Calculate the mass of the air contained in a room that measures 2.50 m 5.50 m 3.00 m (density of air = 1.29 g/dm3 at
25C).
74.
Iridium is essentially tied with osmium for the distinction of being called the “densest element” with a density of 22.5 g/cm3.
What would be the mass in pounds of a 1.0 ft .0 ft 1.0 ft cube of iridium? (1 lb = 453.6 g)
Chapter 01 – Chemistry: The Study of Change
75.
The Hope diamond weighs 44.0 carats. Determine the volume occupied by the diamond, given that its density is 3.5 g/cm3 at
20C, and that 1 carat = 0.200 g.
76.
The density of mercury is 13.6 g/cm3. What is the mass in pounds of 1.0 gallons of mercury? (1 lb = 453.6 g; 1 gal = 3.785 L)
Chapter 01 – Chemistry: The Study of Change
77.
The density of mercury is 13.6 g/cm3. What volume (in quarts) is occupied by 100.g of Hg? (1 L = 1.06 qt)
78.
The “escape velocity” from Earth (the speed required to escape Earth’s gravity) is 2.5 104 miles per hour. What is this speed
in m/s? (1 mile = 1609 m)
Chapter 01 – Chemistry: The Study of Change
79. Which of the following speeds is the greatest? (1 mile = 1609 m)
80. Convert 4.5 m3 to L.
81. Convert 6.4 mm3 to mL.
Chapter 01 – Chemistry: The Study of Change
82. Convert 7.2 cm3 to mm3.
83. Convert 4.6 km to mm.
84. Convert 4.89 mm to µm.
Chapter 01 – Chemistry: The Study of Change
85.
Give the correct number of significant figures and units to the problem below. 56 mm + 4.5 m =
86.
Give the correct number of significant figures and units to the problem below. 3.4 x 10-2 mg + 448 µg =
Chapter 01 – Chemistry: The Study of Change
87.
Give the correct number of significant figures and units to the problem below. 58.00 mg – 45.22 µg =
88.
Give the correct number of significant figures and units to the problem below. 4.51 m x 3.2 m =
Chapter 01 – Chemistry: The Study of Change
89.
Give the correct number of significant figures and units to the problem below. 4.5 m / 8.52 m =
90.
Give the correct number of significant figures and units to the problem below. 8.22 m2 / 9.11 m =