Chapter 1

Question 1

A tentative explanation for a set of observations that can be tested by further experimentation is referred to as
A. a hypothesis.
B. a law.
C. a theory.
D. none of the above.

Answer 1

A

Question 2

A tentative explanation for a set of observations that can be tested by further experimentation is referred to as
A. a hypothesis.
B. a law.
C. a theory.
D. none of the above.

Answer 2

B

Question 3

A unifying principle that explains a body of facts and relations is referred to as
A. a hypothesis.
B. a law.
C. a theory.
D. none of the above.

Answer 3

C

Question 4

Complete the following sentence: A hypothesis is
A. a tentative explanation for a set of observations that can be tested by further
experimentation.
B. a statement describing a relationship between phenomena that is always the same under the same conditions.
C. a unifying principle that explains a body of facts and relations.
D. a model used to visualize the invisible.

Answer 4

A

Question 5

5. Complete the following sentence: A scientific law is
   A. a tentative explanation for a set of observations that can be tested by further
   experimentation.
   B. a statement describing a relationship between phenomena that is always the same under the same conditions.
   C. a unifying principle that explains a body of facts and relations.
   D. a model used to visualize the invisible.

Answer 5

B

Question 6

Complete the following sentence: A theory is
A. a tentative explanation for a set of observations that can be tested by further
experimentation.
B. a statement describing a relationship between phenomena that is always the same under the same conditions.
C. a unifying principle that explains a body of facts and relations.
D. a model used to visualize the invisible.

Answer 6

C

Question 7

Choose the response that includes all the items listed below that are pure substances.
i. orange juice
ii. steam
iii. ocean water
iv. oxygen
v. vegetable soup
A. i, iii, v
B. ii, iv
C. i, iii, iv
D. iv only
E. all of them are pure

Answer 7

B

Question 8

Which one of the following is an example of a physical property?
A. dynamite explodes
B. meat rots if it is not refrigerated
C. gasoline burns
D. ice floats on top of liquid water
E. a silver platter tarnishes

Answer 8

D

Question 8

Which of the following is an example of a physical property?
A. corrosiveness of sulfuric acid
B. toxicity of cyanide
C. flammability of gasoline
D. neutralization of stomach acid with an antacid
E. lead becomes a liquid when heated to 601oC

Answer 8

E

Question 9

Which one of the following represents a physical change?
A. water, when heated to 100C, forms steam
B. bleach turns hair yellow
C. sugar, when heated, becomes brown
D. milk turns sour
E. apples, when exposed to air, turn brown

Answer 9

A

Question 10

All of the following are properties of sodium. Which one is a physical property of
sodium?
A. It’s surface turns black when first exposed to air.
B. It is a solid at 25C and changes to a liquid when heated to 98C.
C. When placed in water it sizzles and a gas is formed.
D. When placed in contact with chlorine it forms a compound that melts at 801C.
E. Sodium is never found as the pure metal in nature.

Answer 10

B

Question 11

All of the following are properties of tin. Which one is a chemical property of tin?
A. Tin can be hammered into a thin sheet.
B. At –40C a sheet of tin crumbles to a gray powder.
C. Tin melts at 231.9C.
D. When a bar of tin is bent, it emits an audible “cry”.
E. Tin erodes when added to hydrochloric acid, and a clear gas forms.

Answer 11

E

Question 12

Which one of the following represents a chemical change?
A. boiling water to form steam
B. burning a piece of coal
C. heating lead until it melts
D. mixing iron filings and sand at room temperature
E. breaking glass

Answer 12

B

Question 13

Which of the following does not represent a chemical change?
A. a freshly cut apple turns brown
B. milk turns sour on standing at room temperature
C. when cooled to 0C, liquid water becomes ice
D. frying an egg
E. fermentation of sugar to alcohol

Answer 13

C

Question 14

The SI prefixes kilo and milli represent, respectively:
A. 10^–9 and 10^–6
B. 10^6 and 10^–3
C. 10^3 and 10^–3
D. 10^9 and 10^–6
E. 10^–9 and 10^–1

Answer 14

C

Question 15

The SI prefixes micro and milli represent, respectively:
A. 10^6 and 10^–6
B. 10^–3 and 10^6
C. 10^3 and 10^–6
D. 10^–3 and 10^9
E. 10^–6 and 10^–3

Answer 15

E

Question 16

The SI prefixes mega and deci represent, respectively:
A. 10^3 and 10^–2
B. 10^6 and 10^–1
C. 10^–3 and 10^–2
D. 10^–6 and 10^2
E. 10^2 and 10^–3

Answer 16

B

Question 17

A centimeter corresponds to:
A. 10^–2 meters.
B. 10^–3 meters.
C. 10^–6 meters.
D. 10^–9 meters.
E. 10^–12 meters.

Answer 17

A

Question 18

A microliter corresponds to:
A. 10^–2 liters.
B. 10^–3 liters.
C. 10^–6 liters.
D. 10^–9 liters.
E. 10^–12 liters.

Answer 18

C

Question 19

Lead melts at 601.0C. What temperature is this in F?
A. 302F
B. 365F
C. 1,050F
D. 1,082F
E. 1,114F

Answer 19

E

Question 20

The element gallium melts at 29.8C. What temperature is this in F?
A. –54.1F
B. –7.8F
C. +13.5F
D. +51.3F
E. +85.6F

Answer 20

E

Question 21

Many home freezers maintain a temperature of 0F. Express this temperature in C.
A. –32C
B. –18C
C. 0C
D. 18C
E. 57.6C

Answer 21

B

Question 22

The highest temperature ever recorded in Phoenix, Arizona, was 122F. Express this temperature in C.
A. 50.0C
B. 64.4C
C. 67.8C
D. 162.0C
E. 219.6C

Answer 22

A

Question 23

Dry ice (carbon dioxide) changes from a solid to a gas at –78.5C. What is this temperature in F?
A. –173F
B. –12.6F
C. –109F
D. –75.6F
E. none of them are within 2F of the right answer

Answer 23

C

Question 24

Liquid nitrogen boils at –195.8C. Express the boiling point of liquid nitrogen in kelvin. A. –469.0 K B. –77.4 K C. all temperatures are 0 K on the Kelvin scale D. 77.4 K E. 469.0 K

Answer 24

D

Question 25

Liquid nitrogen boils at –195.8C. Express the boiling point of liquid nitrogen in F. A. –384.4F B. –352.4F C. –320.4F D. –140.8F E. –76.8F

Answer 25

C

Question 26

How many milliliters is 0.005 L? A. 0.5 mL B. 5 mL C. 0.50 mL D. 0.000005 mL E. 200 mL

Answer 26

B

Question 27

Express 7,500 nm as picometers. A. 7.50 pm B. 75.0 pm C. 750 pm D. 7.5 x 10^6 pm E. 7.5 x 10^12 pm

Answer 27

D

Question 28

The diameter of Earth is 12.7 Mm. Express this diameter in centimeters. A. 1.27 x 10^5 cm B. 1.27 x10^6 cm C. 1.27 x 10^7 cm D. 1.27 x 10^8 cm E. 1.27 x 10^9 cm

Answer 28

E

Question 29

In 1828, the diameter of the U.S. dime was changed to approximately 18 mm. What is this diameter when expressed in nanometers? A. 1.8 x 10^9 nm B. 1.8 x 10^7 nm C. 1.8 x 10^1 nm D. 1.8 x 10^–5 nm E. 1.8 x 10^–10 nm

Answer 29

B

Question 30

Which of the following represents the largest mass? A. 2.0 x 10^2 mg B. 0.0010 kg C. 1.0 x 10^5 ng D. 2.0 x 10^2 cg\ E. 10.0 dg

Answer 30

D

Question 31

The density of lead is 11.4 g/cm3 at 25C. Calculate the volume occupied by 25.0 g of lead. A. 2.19 cm^3 B. 0.456 cm^3 C. 285 cm^3 D. 1.24 cm^3 E. 6.05 cm^3

Answer 31

A

Question 32

Iron has a density of 7.86 g/cm^3. The volume occupied by 55.85 g of iron is A. 0.141 cm^3. B. 7.11 cm^3. C. 2.8 cm^3. D. 439 cm^3. E. None of the above.

Answer 32

B

Question 33

Bromine is a red liquid at 25C. Its density is 3.12 g/cm^3. What is the volume of 28.1 g of liquid bromine? A. 87.7 cm^3 B. 0.111 cm^3 C. 9.01 cm^3 D. 28.1 cm^3 E. None of the above

Answer 33

C

Question 34

What is the volume of a 2.5 g block of metal if its density is 4.75 g/cm3? A. 0.53 cm^3 B. 1.9 cm^3 C. 2.5 cm^3 D. 4.75 cm^3 E. 11.9 cm^3

Answer 34

A

Question 35

Which of the following objects will sink when dropped into a bucket of water? Given: density of water = 1.00 g/cm3) A. a cube of aluminum (density = 2.702 g/cm3) B. a diamond (density = 3.51 g/cm3) C. a chunk of dry ice (density = 1.56 g/cm3) D. a chunk of sodium (density = 0.91 g/cm3) E. a sphere of magnesium (density = 1.74 g/cm3)

Answer 35

D

Question 36

You just measured a block of wood and obtained the following information: mass = 55.120 g length = 8.5 cm height = 4.3 cm width = 3.3 cm Determine the volume and density of the wood block. A. Volume of the wood block = 110 cm3; density of the wood block = 0.36 g/cm3 B. Volume of the wood block = 120 cm3; density of the wood block = 0.36 g/cm3 C. Volume of the wood block = 110 cm3; density of the wood block = 0.46 g/cm3 D. Volume of the wood block = 120 cm3; density of the wood block = 0.46 g/cm3 E. None of the above have both the volume and density reported correctly

Answer 36

D

Question 37

You just measured a metal cylinder and obtained the following information: mass = 3.543 g diameter = 0.53 cm height = 4.4 cm Determine the volume (V) and density of the cylinder. (V=(pi)r^2 h, where r = radius, h = height, pi = 3.14) A. Volume of the cylinder = 0.87 cm3; density of the cylinder = 2.7 g/cm3 B. Volume of the cylinder = 0.97 cm3; density of the cylinder = 3.7 g/cm3 C. Volume of the cylinder = 0.87 cm3; density of the cylinder = 3.7 g/cm3 D. Volume of the cylinder = 0.97 cm3; density of the cylinder = 2.7 g/cm3 E. None of the above have both the volume and density correctly reported

Answer 37

B

Question 38

You just measured a sugar cube and obtained the following information: mass = 3.48 g height = length = width = 1.3 cm Determine the volume and density of the cube. Suppose the sugar cube was added to a cup of water. Before it dissolves, will the sugar cube float or sink to the bottom? A. Volume of the sugar cube = 2.4 cm3; density of the sugar cube = 1.6 g/cm3; float B. Volume of the sugar cube = 2.2 cm3; density of the sugar cube = 1.6 g/cm3; sink C. Volume of the sugar cube = 2.2 cm3; density of the sugar cube = 1.4 g/cm3; sink D. None of these choices has the volume, density and sink or float decision reported correctly

Answer 38

B

Question 39

Express the number 26.7 in scientific notation. A. 2.67 x10^–2 B. 2.67 x 10^–1 C. 2.67 x 10^1 D. 2.67 x 10^2 E. 26.7 is already written in scientific notation

Answer 39

C

Question 40

Express the number 0.000053 in scientific notation. A. 5.3 x 10^-2 B. 5.3 x 10^-3 C. 5.3 x 10^-4 D. 5.3 x 10^-5 E. 5.3 x 10^-6

Answer 40

D

Question 41

The number 1.050 x 10^9 has how many significant figures? A. 2 B. 3 C. 4 D. 9 E. 13

Answer 41

C

Question 42

How many significant figures are there in 0.3070 g? A. 6 B. 5 C. 4 D. 3 E. 2

Answer 42

C

Question 43

After carrying out the following operations, how many significant figures are appropriate to how in the result? (13.7 + 0.027) / 8.221 A. 1 B. 2 C. 3 D. 4 E. 5

Answer 43

C

Question 44

How many significant figures does the result of the following operation contain? 8.52010 x 7.90 A. 2 B. 3 C. 4 D. 5 E. 6

Answer 44

B

Question 45

How many significant figures does the result of the following sum contain? 8.5201 + 1.93 A. 1 B. 2 C. 3 D. 4 E. 5

Answer 45

D

Question 46

How many significant figures does the result of the following sum contain? 8.520 + 2.7 A. 1 B. 2 C. 3 D. 4 E. 5

Answer 46

C

Question 47

How many significant figures does the difference 218.7201 – 218.63 contain? A. 1 B. 2 C. 3 D. 5 E. 7

Answer 47

A

Question 48

Using the arithmetic problem below, determine the correct number of significant figures. (1.5 x 10^–4 x 61.3) + 2.01 = A. 2.0192 B. 2.0 C. 2.019 D. 2.02 E. 2.019195

Answer 48

D

Question 49

Give the correct number of significant figures to the problem below. 2.4 x 10-4 + 3.1 x 10-2 = A. 5.5 x 10^-6 B. 5.5 x 10^-8 C. 5.5 x 10^-4 D. 3.1 x 10^-2 E. 2.4 x 10^-4

Answer 49

D

Question 50

Give the correct number of significant figures to the problem below. 5.80 x 10^-1 – 3.4 x 10^-2 = A. 5.5 x 10^-1 B. 5.46 x 10^-1 C. 2.4 x 10^-3 D. 2.4 x 10^2 E. 5.5 x 10^-2

Answer 50

B

Question 51

Give the correct number of significant figures to the problem below. 4.5 x 1014 / 8.3 x 108 = A. 5.4 x 10^21 B. 5.4 x 10^22 C. 5.4 x 10^6 D. 5.4 x 10^14 E. 5.4 x 10^5

Answer 51

E

Question 52

Give the correct number of significant figures to the problem below. 6.2 x 10-13 x 5.68 x 108 = A. 3.5 x 10^-13 B. 3.5 x 10^-5 C. 3.5 x 10^-104 D. 3.5 x 10^-4 E. 3.5 x 10^-21

Answer 52

D

Question 53

Convert 2.340 x 10^-4 to decimal format. A. 23,400 B. 2,340 C. 0.000234 D. 0.0002340 E. 0.002340

Answer 53

D

Question 54

Convert 4.5 x 10^4 to decimal format. A. 45,000 B. 4,500 C. 0.00045 D. 0.0045 E. 0.000450

Answer 54

A

Question 55

Convert 5.00 x 102 milliliters to quarts. (1L = 1.06 qt) A. 1.88 qt B. 0.472 qt C. 0.528 qt D. 4.72 x 10^5 qt E. 5.28 x 10^5 qt

Answer 55

C

Question 56

1 US barrel = 4.21 cubic feet. Express this volume in liters. A. 3.99 x 10^–5 L B. 1.99 x 10^–2 L C. 19.9 L D. 105 L E. 119 L

Answer 56

E

Question 57

1 barrel of oil contains 42.0 gallons. How many liters is this? (1L = 1.06 qt) A. 9.9 L B. 11 L C. 142 L D. 158 L E. 178 L

Answer 57

D

Question 58

The average distance from Earth to the sun is 9.3 x 10^7 miles. How many kilometers is this? A. 1.5 x 10^8 km B. 1.5 x 10^5 km C. 5.6 x 10^7 km D. 1.7 x 10^–8 km E. 1.5 x 10^11 km

Answer 58

A

Question 59

What is the area, in square centimeters, of an 8.5 inch by 11 inch sheet of paper? A. 94 cm2 B. 240 cm2 C. 420 cm2 D. 6.0 x 10^2 cm2 E. 1.2 x 10^4 cm

Answer 59

D

Question 60

Suppose a house has a floor area of 2,250 square feet. What is this area in units of square centimeters? A. 2.42 cm2 B. 2.09 x 10^6 cm2 C. 5.02 x 10^4 cm2 D. 6.86 x 10^4 cm2 E. 101 cm2

Answer 60

B

Question 61

What is the volume, in cubic inches, of a brick that is 4.0 in x 2.7 in x 8.0 in? A. 15 in3 B. 51 in3 C. 78 in3 D. 87 in3 E. 150 in3

Answer 61

D

Question 62

What is the volume, in cubic centimeters, of a brick that is 4.0 in  2.7 in  8.0 in? A. 5.3 cm3 B. 53 cm3 C. 87 cm3 D. 4.8 x 10^2 cm3 E. 1.4 x 10^3 cm3

Answer 62

E

Question 63

How many square kilometers are equivalent to 28.5 cm2? A. 2.85 x 10^–9 km2 B. 2.85 x 10^–6 km2 C. 285 km2 D. 2.85 x 10^–4 km2 E. none of these

Answer 63

A

Question 64

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) A. 200 km/L B. 180 km/L C. 70 km/L D. 13 km/L E. 11 km/L

Answer 64

D

Question 65

If the price of gasoline is $3.85 per U.S. gallon, what is the cost per liter? (1 L = 1.06 qt) A. $1.02/L B. $14.60/L C. $0.96/L D. $3.85/L E. $3.63/L

Answer 65

A

Question 66

An aluminum beverage can contain 12.0 fluid ounces of liquid. Express this volume in liters. 1 fl oz = 29.6 mL) A. 4.07 x 10^-2 L B. 0.355 L C. 0.407 L D. 2.46 L E. 3.55 x 10^2 L

Answer 66

B

Question 67

1.572 x 10^8 troy oz of silver were used in the United States in 1980. How many kilograms is this? (1 troy oz = 31.1 g) A. 4.89 x 10^6 kg B. 4.89 kg C. 5.05 x 10^6 kg D. 4.89 x 10^12 kg E. 5.05 x 10^3 kg

Answer 67

A

Question 68

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? A. 2.70 g/cm3 B. 7.13 g/cm3 C. 8.96 g/cm3 D. 10.5 g/cm3 E. 19.3 g/cm3

Answer 68

E

Question 69

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? A. 0.154 g/cm3 B. 0.592 g/cm3 C. 2.68 g/cm3 D. 6.51 g/cm3 E. 7.25 g/cm3

Answer 69

D

Question 70

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 25C are provided: magnesium, 1.7 g/cm3; graphite, 1.8 g/cm3; iron, 7.9 g/cm3. A. 1,400 g B. 3,800 g C. 830 g D. 180 g E. none of them are within 10 g of the right answer.

Answer 70

D

Question 71

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 25C are provided: magnesium, 1.7 g/cm3; graphite, 1.8 g/cm3; iron, 7.9 g/cm3. A. 110 g B. 2120 g C. 6870 g D. 34 g E. none of them are within 10 g of the right answer.

Answer 71

A

Question 72

Calculate the mass of the air contained in a room that measures 2.50 m x 5.50 m x 3.00 m (density of air = 1.29 g/dm3 at 25C). A. 3.13 x 10^–5 g B. 32.0 kg C. 53.2 kg D. 53.2 g E. None of the above.

Answer 72

C

Question 73

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 x .0 ft x 1.0 ft cube of iridium? (1 lb = 453.6 g) A. 1.5 lb B. 5.2 lb C. 6.20 lb D. 1.4 x 10^3 lb E. 6.4 x 10^5 lb

Answer 73

D

Question 74

The Hope diamond weighs 44.0 carats. Determine the volume occupied by the diamond, given that its density is 3.5 g/cm3 at 20C, and that 1 carat = 0.200 g. A. 2.5 cm3 B. 0.40 cm3 C. 0.016 cm3 D. 63 cm3 E. 150 cm3

Answer 74

A

Question 75

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) A. 0.11 lb B. 30. Lb C. 51 lb D. 83 lb E. 110 lb

Answer 75

E

Question 76

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) A. 144 qt B. 7.35 qt C. 7.79 qt D. 7.79 x 10^–3 qt E. 1.44 x 10^–4 qt

Answer 76

D

Question 77

The "escape velocity" from Earth (the speed required to escape Earth's gravity) is 2.5 x 10^4 miles per hour. What is this speed in m/s? (1 mile = 1609 m) A. 4.2 x 10^–3 m/s B. 6.9 m/s C. 4.2 x 10^2 m/s D. 1.1 x 10^4 m/s E. 4.0 x 10^7 m/s

Answer 77

D

Question 78

Which of the following speeds is the greatest? (1 mile = 1609 m) A. 40 mi/h B. 2.0 x10^5 mm/min C. 40 km/h D. 0.74 km/min E. 400 m/min

Answer 78

A

Question 79

Convert 4.5 m3 to L. A. 4.5 x 10^-1 L B. 4.5 x 10^1 L C. 4.5 x 10^-3 L D. 4.5 x 10^3 L E. 4.5 x 1^02 L

Answer 79

D

Question 80

Convert 6.4 mm3 to mL. A. 6.4 x 10^-3 mL B. 6.4 x 10^-1 mL C. 6.4 x 10^3 mL D. 6.4 x 10^-2 mL E. 6.4 mL

Answer 80

A

Question 81

Convert 7.2 cm3 to mm3. A. 7.2 x 10^1 mm3 B. 7.2 x 10^-5 mm3 C. 7.2 x 10^-3 mm3 D. 7.2 x 10^2 mm3 E. 7.2 x 10^3 mm3

Answer 81

E

Question 82

Convert 4.6 km to mm. A. 4.6 x 10^6 mm B. 4.6 x 10^3 mm C. 4.6 x 10^-6 mm D. 4.6 x 10^-2 mm E. 4.6 x 10^4 mm

Answer 82

A

Question 83

Convert 4.89 mm to µm. A. 4.89 x 10^-6 µm B. 4.89 x 10^-3 µm C. 4.89 x 10^3 µm D. 4.89 x 10^6 µm E. 4.89 x 10^9 µm

Answer 83

C

Question 84

Give the correct number of significant figures and units to the problem below. 56 mm + 4.5 m = A. 61 mm B. 61 m C. 61 m2 D. 4.6 m E. 4.56 m

Answer 84

D

Question 85

Give the correct number of significant figures and units to the problem below. 3.4 x 10^-2 mg + 448 µg = A. 0.48 mg B. 0.482 mg C. 4.5 mg D. 4.48 mg E. 4.5 x 10^2 mg

Answer 85

B

Question 86

Give the correct number of significant figures and units to the problem below. 58.00 mg – 45.22 µg = A. 57.95 mg B. 12.78 mg C. 12.78 µg D. 57.55 µg E. 12.78 mg2

Answer 86

A

Question 87

Give the correct number of significant figures and units to the problem below. 4.51 m x 3.2 m = A. 14.4 m B. 14 m C. 14 m2 D. 14.4 E. 14.4 m2

Answer 87

C

Question 88

Give the correct number of significant figures and units to the problem below. 4.5 m / 8.52 m = A. 0.528 m B. 0.53 m C. 0.53 m2 D. 0.53 E. 0.528 m2

Answer 88

D

Question 89

Give the correct number of significant figures and units to the problem below. 8.22 m2 / 9.11 m = A. 0.902 m2 B. 0.902 m3 C. 0.902 m D. 0.902 E. 0.90 m2

Answer 89

C

Question 90

Give the correct number of significant figures and units to the problem below. 5.46 m3 / 2.01 m2 = A. 2.72 m5 B. 2.72 m3 C. 2.72 m2 D. 2.72 m E. 2.72 m-1

Answer 90

D

Question 91

Give the correct number of significant figures and units to the problem below. 5.67 m/ 2.04 m2 = A. 2.78 m3 B. 2.78 m2 C. 2.78 m D. 2.78 E. 2.78 m-1

Answer 91

E

Question 92

Give the correct number of significant figures and units to the problem below. (3.45 m + 2.78 m)/ 565 s = A. 1.10 x 10-2 m2/s B. 1.10 x 10-2 m/s C. 1.10 x 10-2s^-1 D. 1.10 x 10-2s E. 1.10 x 10-2 m2

Answer 92

B

Question 93

Give the correct number of significant figures and units to the problem below. (5.62 cm – 0.45 cm)/ 342 s = A. 1.51 x 10-2 s^-1 B. 1.5 x 10-2 cm2/s C. 1.51 x 10-2 cm/s D. 1.5 s-1 E. 1.51 x 10-2 cm2.s

Answer 93

C

Question 94

A long course triathlon entails a 2.0 mile swim, an 85.5 mile bike ride and a 15.0 mile run. What is the total distance in kilometers for the triathlon? A. 160 km B. 165 km C. 103 km D. 164.9 km E. 102.5 km

Answer 94

D

Question 95

A cyclist averages 18.5 miles per hour. How many minutes will it take for him to complete a 125 kilometer race? A. 252 min B. 652 min C. 420 min D. 1440 min E. 405 min

Answer 95

A

Question 96

A runner averages 8 minutes and 25 seconds per mile. What is her average velocity in miles per hour? A. 7.27 mi/hr B. 7.13 mi/hr C. 8.42 mi/hr D. 4.36 mi/hr E. 0.140 mi/hr

Answer 96

B

Question 97

Iron has a density of 7.87 g/cm3. What mass of iron would be required to cover a football playing surface of 120 yds x 60 yds to a depth of 1.0 mm? (1 inch = 2.54 cm; 1 lb = 453.6 g) A. 6.4 x 103 lb B. 6.4 x 104 lb C. 1.0 x 105 lb D. 4.7 x 107 lb E. 4.7 x 108 lb

Answer 97

C

Question 98

How many cubic centimeters of an ore containing only 0.22% gold (by mass) must be processed to obtain $100.00 worth of gold? The density of the ore is 8.0 g/cm3 and the price of gold is $818 per troy ounce. (14.6 troy oz = 1.0 ordinary pound, called an avoirdupois pound; 1 lb = 454 g) A. 0.48 cm3 B. 220 cm3 C. 1.4 x 103 cm3 D. 1.7 x 103 cm3 E. 1.8 x 104 cm3

Answer 98

B

Question 99

Radio waves travel at the speed of light, which is 3.00  108 m/s. How many minutes does it take for a radio message to reach Earth from Saturn if Saturn is 7.9  108 km from Earth? A. 4.4 x 10^–2 min B. 1.6 x 10^5 min C. 4.0 x 10^15 min D. 44 min E. 2.6 min

Answer 99

D

Question 100

Radio waves travel at the speed of light, which is 3.00  108 m/s. How many kilometers will radio messages travel in exactly one year? A. 9.46 x 10^15 km B. 7.30 x 10^8 km C. 7.10 x 10^10 km D. 9.46 x 10^12 km E. 3.33 x 10^–3 km

Answer 100

D

Question 101

The city of Los Angeles is now approximately 2400 miles south of Alaska. It is moving slowly northward as the San Andreas fault slides along. If Los Angeles is to arrive near Anchorage, Alaska, in 76 million years, at what average rate will it have to move in mm per month? A. 2.0 x 10–10 mm/mo. B. 6.6 x 10–6 mm/mo. C. 4.2 mm/mo. D. 9.5 mm/mo. E. 51 mm/mo.

Answer 101

C

Question 102

The recommended daily allowance (RDA) of calcium is 1.2 g. Calcium carbonate contains 12.0% calcium by mass. How many grams of calcium carbonate are needed to provide the RDA of calcium? A. 0.10 g B. 0.14 g C. 1.2 g D. 10 g E. 14 g

Answer 102

D

Question 103

A spherical vessel (diameter = 2.00 cm) when empty has a mass of 2.00 g. What is the greatest volume of water that can be placed in the vessel and still have the vessel float at the surface of water? (Given: density of water = 1.00 g/cm3) A. 2.00 mL B. 31.5 mL C. 2.19 mL D. 4.19 mL E. the vessel will not float even when empty

Answer 103

C

Question 104

A spherical vessel (diameter = 5.00 cm) when empty has a mass of 12.00 g. What is the greatest volume of water that can be placed in the vessel and still have the vessel float at the surface of benzene? (Given: density of water = 1.00 g/cm3; density of benzene = 0.879 g/cm3) A. 45.5 mL B. 448 mL C. 53.4 mL D. 57.5 mL E. 65.4 mL

Answer 104

A

Question 105

One of the common intravenous fluids, called physiological saline, is a homogeneous mixture of NaCl in water. In this mixture, 0.89% of the mass is contributed by the NaCl. What mass of NaCl is found in 450. mL of physiological saline? (Given: density of physiological saline = 1.005 g/cm3) A. 2.0 g B. 4.0 g C. 5.1 g D. 508 g E. 400 g

Answer 105

B

Question 106

A special flask used in the determination of densities, called a pycnometer, has a mass of 16.3179 g when empty, and it has a mass of 48.0250 g when filled with water at 20.0C. When this same pycnometer is filled with ethyl alcohol at 20.0C, it is found to have a mass of 41.3934 g. Find the density of ethyl alcohol at 20.0C. (Given: at 20.0C, the density of water is 0.9982 g/mL) A. 0.7894 g/mL B. 0.7923 g/mL C. 0.7908 g/mL D. 1.303 g/mL E. 0.7674 g/mL

Answer 106

A

Question 107

A particular flask has a mass of 17.4916 g when empty. When filled with ordinary water at 20.0C (density = 0.9982 g/mL), the mass of the flask is now 43.9616 g. The density of so-called "heavy water" at 20.0C is 1.1053 g/mL. What will the mass of the flask be when filled with heavy water at 20.0C? A. 29.2573 g B. 46.8016 g C. 46.7489 g D. 29.3100 g E. 43.9140 g

Answer 107

B

Question 108

Which of the following is the correct definition of matter? A. Matter is anything that has a density greater than 1 B. Matter is anything that occupies space and has mass. C. Matter must either be a solid or a liquid D. Matter can only be a pure substance E. Matter can only exist on Earth

Answer 108

B

Question 109

Which of the following is an accurate definition of a pure substance? A. A pure substance must be made of only one element B. A pure substance must be a solid at room temperature C. A pure substance will be transparent D. A pure substance is matter that cannot be broken down into other matter E. A pure substance is matter that has a definite composition

Answer 109

E

Question 110

Of the following which is NOT a pure substance? A. gold B. sugar C. water D. air E. methane

Answer 110

D

Question 111

Which of the following is true of a mixture? A. A mixture is a combination of two or more substances in which the substances retain their distinct identities. B. A mixture is a substance that cannot be separated into simpler substances by chemical means. C. A mixture is a substance composed of atoms of two or more elements D. A mixture must be homogeneous E. A mixture must be heterogeneous

Answer 111

A

Question 112

Of the following which is NOT an example of a mixture? A. gasoline B. sea water C. iron D. air E. sand

Answer 112

C

Question 113

Which of the following is true of an element? A. An element is a substance composed of atoms of two or more elements B. An element is a substance that cannot be separated into simpler substances by chemical means. C. An element is combination of two or more substances in which the substances retain their distinct identities. D. An element must be heterogeneous E. An element must be a solid at room temperature

Answer 113

B

Question 114

Which of the following is true of a compound? A. A compound is a substance composed of atoms of two or more elements chemically united in a fixed ratio. B. A compound is a substance that cannot be separated into simpler substances by chemical means. C. A compound is combination of two or more substances in which the substances retain their distinct identities. D. A compound must be heterogeneous. E. A compound must be a solid at room temperature.

Answer 114

A

Question 115

Select True or False: Sugar to put in coffee is a compound.

Answer 115

True

Question 116

Select True or False: A pure yellow crystalline substance, when heated in a vacuum, releases a greenish gas and a red powder. Is the original yellow crystalline substance a compound?

Answer 116

True

Question 117

What are the three states of matter? A. Compound, element, mixture B. Compound, solid, liquid C. Solid, liquid, element D. Solid, liquid, gas E. Solid, liquid, compound

Answer 117

D

Question 118

What are the common names for the solid, liquid, and gaseous states of water? A. Ice, water, gas B. Ice, water, steam C. Cubes, liquid, vapor D. Ice, water, plasma E. Molecules, atoms, ions

Answer 118

B

Question 119

Of the following which is NOT a physical property? A. Melting point B. Boiling point C. Density D. Color E. Ability to react with oxygen

Answer 119

E

Question 120

Select True or False: The corrosion of a metal is a physical change.

Answer 120

False

Question 121

Select True or False: The ripening of fruit is a physical change.

Answer 121

False

Question 122

Select True or False: Fermenting of grapes is physical change.

Answer 122

False

Question 123

Select True or False: Antifreeze boiling out of a radiator is a physical change.

Answer 123

True

Question 124

Select True or False: Food spoiling is a chemical change.

Answer 124

True

Question 125

Select True or False: Alcohol evaporating is a physical change

Answer 125

True

Question 126

Select True or False: Water boiling at 100 C is a physical property.

Answer 126

True

Question 127

Select True or False: Newspaper burning is an example of a physical property

Answer 127

False

Question 128

In the process of fixing breakfast you: 1. break open the egg 2. fry it 3. cut the fried egg into pieces 4. cut toast in half Which one of these is a chemical process? A. #1 B. #2 C. #3 D. #4 E. None of the above

Answer 128

B

Question 129

Select True or False: Density is an intensive property.

Answer 129

True

Question 130

Select True or False: Length is an intensive property

Answer 130

False

Question 131

Select True or False: Cost per unit is an intensive property.

Answer 131

True

Question 132

Select True or False: Total cost is an extensive property.

Answer 132

True

Question 133

Select True or False: Melting point is an extensive property

Answer 133

False

Question 134

Select True or False: Boiling point is an intensive property.

Answer 134

True

Question 135

Select True or False: Mass is an intensive property.

Answer 135

False

Question 136

Select True or False: 0 K is the lowest temperature that can be attained theoretically.

Answer 136

True

Question 137

Select True or False: The lowest temperature that can be attained in units of C (use 3 significant figures) is 273oC.

Answer 137

False

Question 138

An organic liquid has a density of 1.2 g/cm3. What is the mass of a 35.0 cm3 sample of this liquid? A. 35 g B. 29 g C. 42 g D. 36 E. None of the above

Answer 138

C

Question 139

What is the density of copper if 11.8 cm3 of copper has a mass of 105.2 g? A. 7.92 g/cm3 B. 8.92 g/cm3 C. 9.92 g/cm3 D. 10.92 g/cm3 E. None of the above

Answer 139

B

Question 140

What is the density of a salt solution if 75.0 mL of the solution has a mass of 32.0 g? A. 0.127 g/mL B. 0.227 g/mL C. 0.327 g/mL D. 0.427 g/mL E. None of the above

Answer 140

D

Question 141

Select True or False: The weight of a body varies according to the force of gravity exerted on the body.

Answer 141

True

Question 142

Select True or False: The mass of a body varies according to the force of gravity exerted on the body.

Answer 142

False

Question 143

Select True or False: The SI base unit of time is the hour

Answer 143

False

Question 144

Select True or False: 20C is colder than 40F.

Answer 144

False

Question 145

Select True or False: 16 megagrams (Mg) is equal to 1.6 x 10^7 g.

Answer 145

True

Question 146

Select True or False: The number 30.40 contains three significant figures.

Answer 146

False

Question 147

Select True or False: The number 0.07010 contains four significant figures.

Answer 147

True

Question 148

Select True or False: The number 9.64000 x 10^5 contains six significant figures

Answer 148

True

Question 149

An automobile engine has a piston displacement of 1,600 cm3. Express this volume in liters. A. 0.16 L B. 16 L C. 1.6 L D. 160 L E. None of the above

Answer 149

C

Question 150

An automobile engine has a piston displacement of 1,600 cm3. Express this volume in cubic inches. (1 in = 2.54 cm) A. .0998 in3 B. 9.8 in3 C. 98 in3 D. 9980 in3 E. None of the above

Answer 150

C

Question 151

An investor paid market price for a chunk of gold that he was told was pure. The gold bar had a mass of 440 g, but was slightly irregular so an exact volume could not be calculated. The investor filled a large graduated cylinder with water, immersed the chunk of gold, and observed an increase in the apparent volume of material in the graduated cylinder of 25.0 mL. Pure gold has a density of 19.3 g/cm3 . What is the density of the investor's chunk of gold? A. 17.9 g/cm3 B. 17.6 g/cm3 C. 17.4 g/cm3 D. 17.1 g/cm3 E. None of the above

Answer 151

B

Question 152

An American engineer who had been transferred to Europe was asked to build bridge pilings exactly as he had in the United States. Each piling required 20.0 cubic yards of concrete in the United States. How many cubic meters of concrete are required for each piling? Given: 1yd = 0.914 m. A. 15.3 m3 B. 16.3 m3 C. 17.3 m3 D. 18.3 m3 E. None of the above

Answer 152

A

Question 153

A soft drink costs 75 cents for a 12-oz can. A two-liter bottle costs $1.25. How much more expensive is the can compared to the two-liter bottle? (1.0 L = 1.057 qt, 1 qt = 32 oz) A. The can is over two times more expensive by volume. B. The can is over three times more expensive by volume. C. The can is over four times more expensive by volume. D. The can is over five times more expensive by volume. E. None of the above

Answer 153

B

Question 154

A person weighs 150.0 lb, and the correct dosage of a drug is given as 1.50 mg per kilogram of body weight. How many milligrams of the drug should be given? (2.20 lb = 1 kg) A. 115 mg B. 112 mg C. 108 mg D. 102 mg E. None of the above

Answer 154

D

Question 155

An archeologist finds a huge monolith in the desert. In order to estimate the weight of this object; he estimates the dimensions of the monolith and removes some chips from the rock with his hammer, collecting the following data: dimensions of the monolith = 1.5 m x 5.2 m x 13 m mass of rock chips = 41.73 g volume of rock chips = 15.2 cm3 Determine the mass of the monolith in pounds, assuming it is of uniform composition. (1 lb = 453.6 g) A. 5.9 x 105 lb B. 6.1 x 105 lb C. 6.3 x 105 lb D. 6.5 x 105 lb E. None of the above

Answer 155

B

Question 156

An excavator is preparing to dig a basement for a new house. Part of his contract reads that he must dispose of all the dirt he removes while digging the basement in an EPA approved landfill. He will dig a hole that is 40 feet wide by 50 feet long and 7.5 feet deep. He first uses his shovel and scoops up 1.00 kg of dirt, and then determines that the dirt as a volume of 600 cm3. The excavator knows that his dump truck can only carry 8,000 kg of dirt. How many dump-truck loads will it take to haul the dirt away? A. 89 dump-truck loads B. 95 dump-truck loads C. 99 dump-truck loads D. 101dump-truck loads E. None of the above

Answer 156

A

Question 157

What will be the cost of gasoline for a 3,700-mile trip in a car that gets 23 miles per gallon if the average price of gas is $3.90 per gallon? A. $690 B. $670 C. $650 D. $630 E. None of the above

Answer 157

D

Question 158

What will be the cost of gasoline for a 4,700-mile automobile trip if the car gets 41 miles per gallon, and the average price of gas is $3.79 per gallon? A. $410 B. $420 C. $430 D. $440 E. None of the above

Answer 158

C

Question 159

The density of lead is 11.4 g/cm3. Express this density in pounds per cubic foot. A. 711 lbs/ft3 B. 721 lbs/ft3 C. 731 lbs/ft3 D. 741 lbs/ft3 E. None of the above

Answer 159

A

Question 160

What is the mass of 1.00 dm3 of mercury? The density of mercury is 13.6 g/cm3. A. 1.26 x 104 g B. 1.36 x 104 g C. 1.46 x 104 g D. 1.56 x 104 g E. None of the above

Answer 160

B