Central Science: Chapter 1 Flashcards


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1

What is the physical state in which matter has a specific volume but does not have a specific shape?
A) gas
B) solid
C) liquid
D) salts
E) ice

C

2

The law of constant composition applies to ________.
A) solutions
B) heterogeneous mixtures
C) compounds
D) homogeneous mixtures
E) solids

C

3

A combination of sand, salt, and water is an example of a ________.
A) homogeneous mixture
B) heterogeneous mixture
C) compound
D) pure substance
E) solid

B

4

A small amount of salt dissolved in water is an example of a ________.
A) homogeneous mixture
B) heterogeneous mixture
C) compound
D) pure substance
E) solid

B

5

Which one of the following has the element name and symbol correctly matched?
A) S, sodium
B) Tn, tin
C) Fe, iron
D) N, neon
E) B, bromine

C

6

Which one of the following elements is identified by the chemical symbol, Al?
A) tin
B) aluminum
C) mercury
D) copper
E) lead

B

7

Which one of the following is often separated into its components by simple techniques such as filtering or decanting?
A) heterogeneous mixture
B) compounds
C) homogeneous mixture
D) elements
E) solutions

A

8

Which states of matter are significantly compressible?
A) gases only
B) liquids only
C) solids only
D) liquids and gases
E) solids and liquids

A

9

For which of the following, can the composition vary?
A) pure substance
B) element
C) both homogeneous and heterogeneous mixtures
D) homogeneous mixture
E) heterogeneous mixture

C

10

If matter is uniform throughout and cannot be separated into other substances by physical means, it is ________.
A) a compound
B) either an element or a compound
C) a homogeneous mixture
D) a heterogeneous mixture
E) an element

B

11

An element cannot ________.
A) be part of a heterogeneous mixture
B) be part of a homogeneous mixture
C) be separated into other substances by chemical means
D) interact with other elements to form compounds
E) be a pure substance

C

12

Homogeneous mixtures are also known as ________.
A) solids
B) compounds
C) elements
D) substances
E) solutions
Answer: E

E

13

The law of constant composition says ________.
A) that the composition of a compound is always the same
B) that all substances have the same composition
C) that the composition of an element is always the same
D) that the composition of a homogeneous mixture is always the same
E) that the composition of a heterogeneous mixture is always the same

A

14

Which of the following is an illustration of the law of constant composition?
A) Water boils at 100 °C at 1 atm pressure.
B) Water is 11% hydrogen and 89% oxygen by mass.
C) Water can be separated into other substances by a chemical process.
D) Water and salt have different boiling points.
E) Water is a compound.

B

15

In the following list, only ________ is not an example of a chemical reaction.
A) dissolution of a penny in nitric acid
B) the condensation of water vapor
C) a burning candle
D) the formation of polyethylene from ethylene
E) the rusting of iron

B

16

Gases and liquids share the property of ________.
A) compressibility
B) definite volume
C) incompressibility
D) indefinite shape
E) definite shape

D

17

Of the following, only ________ is a chemical reaction.
A) melting of lead
B) dissolving sugar in water
C) tarnishing of silver
D) crushing of stone
E) dropping a penny into a glass of water

C

18

Which one of the following is not an intensive property?
A) density
B) temperature
C) melting point
D) mass
E) boiling point

D

19

Which one of the following is an intensive property?
A) mass
B) temperature
C) length
D) volume
E) amount

B

20

Of the following, only ________ is an extensive property.
A) density
B) volume
C) boiling point
D) freezing point
E) temperature

B

21

Which of the following are chemical processes?
1. rusting of a nail
2. freezing of water
3. decomposition of water into hydrogen and oxygen gases
4. compression of oxygen gas
A) 2, 3, 4
B) 1, 3, 4
C) 1, 3
D) 1, 2
E) 1, 4

C

22

In the following list, only ________ is not an example of a chemical reaction.
A) burning a plastic water bottle
B) the production of hydrogen gas from water
C) the tarnishing of a copper penny
D) chopping a log into sawdust
E) charging a cellular phone

D

23

Of the following, ________ is the largest mass.
A) 25 kg
B) 2.5 × 10-2 mg
C) 2.5 × 1015 pg
D) 2.5 × 109 fg
E) 2.5 × 1010 ng

A

24

Which one of the following is the highest temperature?
A) 38 °C
B) 96 °F
C) 302 K
D) none of the above
E) the freezing point of water

A

25

Which of the following is (are) the lowest temperature?
A) The freezing point of water
B) 5 °C
C) 30 °F
D) 280 K
E) A and D

C

26

Which one of the following is true about the liter?
A) It is the SI base unit for volume.
B) It is equivalent to a cubic decimeter.
C) It is slightly smaller than a quart.
D) It contains 106 cubic centimeters.
E) It is slightly smaller than a gallon.

B

27

Which of the items below would be considered the most dense?
A) a piece of wood with a volume of 2.5 L and a mass of 12.5 kg
B) a ball with a volume of 139 mL and a mass of 93 g
C) a tire with a volume of 2.12 L and a mass of 4.22 × 104 mg
D) a wire with a volume of 3.91 × 10-7 L and a mass of 7.93 × 10-1 ng
E) a block of metal with a volume of 1350 mL and a mass of 1.29 × 103 g

A

28

Which calculation clearly shows a conversion between temperatures in degrees Celsius, °C, and temperature in Kelvins, K?
A) K = °C + 273.15
B) K = 273.15 - °C
C) K = [°C - 32] / 1.8
D) K = [°C + 32] × 1.8
E) K = °C

A

29

You have to calculate the mass of a 30.0 mL liquid sample with density of 1.52 g/mL, but you have forgotten the formula. Which way of reasoning would help you in finding the correct mass?
A) If 1 mL of a liquid has the mass of 1.52 g, then 30.0 mL has the mass of ________ g.
B) If 1.52 mL of a liquid has the mass of 1 g, then 30.0 mL has the mass of ________ g.

A

30

You have to calculate the volume of a gas sample with mass of 1.000 × 103 g and density of 1.027 g/L, but you have forgotten the formula. Which way of reasoning would help you in finding the correct mass?
A) If 1.027 g of a gas takes up a volume of 1 L, then 1.000 × 103 g of the same gas takes up a volume of ________.
B) If 1.027 L of gas has a mass of 1 g, then ________ L has the mass of 1.000 × 103 g.

A

31

Osmium has a density of 22.6 g/cm3. What volume (in cm3) would be occupied by a 21.8 g sample of osmium?
A) 0.965
B) 1.04
C) 493
D) 2.03 × 10-3
E) 2.03 × 103

A

32

Iron has a density of 7.9 g/cm3. What is the mass of a cube of iron with the length of one side equal to 55.0 mm?
A) 2.1 × 104 g
B) 4.3 × 102 g
C) 1.3 × 103 g
D) 1.4 g
E) 2.3 × 10-2 g

C

33

Precision refers to ________.
A) how close a measured number is to other measured numbers
B) how close a measured number is to the true value
C) how close a measured number is to the calculated value
D) how close a measured number is to zero
E) how close a measured number is to infinity

A

34

Accuracy refers to ________.
A) how close a measured number is to zero
B) how close a measured number is to the calculated value
C) how close a measured number is to other measured numbers
D) how close a measured number is to the true value
E) how close a measured number is to infinity

D

35

Which of the following has the same number of significant figures as the number 1.00310?
A) 1 × 106
B) 199.791
C) 8.66
D) 5.119
E) 11.762

B

36

Acceleration due to gravity of a free-falling object is 9.8 m/s2. Express this in millimeters/millisecond2.
A) 9.8 × 10-9
B) 9.8 × 103
C) 9.8 × 10-6
D) 9.8
E) 9.8 × 10-3

E

37

If an object is accelerating at a rate of 25 m/s2, how long (in seconds) will it take to reach a speed of 550 m/s? (Assume an initial velocity of zero.)
A) 22
B) 1.4 × 104
C) 0.045
D) 1.2 × 104
E) 2.3 × 102

A

38

If an object is traveling at a speed of 400 m/s, how long (in hours) will it take to reach 950.5 km?
A) 3.96 × 10-2
B) 7.01 × 10-6
C) 1.43 × 105
D) 39.6
E) 6.34

D

39

A wooden object has a mass of 10.782 g and occupies a volume of 13.72 mL. What is the density of the object determined to an appropriate number of significant figures?
A) 8 × 10-1 g/mL
B) 7.9 × 10-1 g/mL
C) 7.86 × 10-1 g/mL
D) 7.859 × 10-1 g/mL
E) 7.8586 × 10-1 g/mL

D

40

Expressing a number in scientific notation ________.
A) changes its value
B) removes ambiguity as to the significant figures
C) removes significant zeros
D) allows an increase in the number's precision
E) all of the above

B

41

The number with the most significant zeros is ________.
A) 0.00002510
B) 0.02500001
C) 250000001
D) 2.501 × 10-7
E) 2.5100000

C

42

How many significant figures should be retained in the result of the following calculation?

12.00000 × 0.9893 + 13.00335 × 0.0107
A) 2
B) 3
C) 4
D) 5
E) 6

C

43

In which one of the following numbers are all of the zeros significant?
A) 100.090090
B) 0.143290
C) 0.0010
D) 0.0001
E) 0.1

A

44

Which of the following is not an exact number?
A) the number of seconds in a year
B) the number of millimeters in a kilometer
C) the number of liters in a gallon
D) the number of centimeters in an inch
E) the number of grams in a kilogram

C

45

Round the number 0.007222 to three significant figures.
A) 0.007
B) 0.00722
C) 0.0072
D) 0.00723
E) 0.007225

B

46

Round the number 3456.5 to two significant figures.
A) 3400.0
B) 3400
C) 3000
D) 3500
E) 3000.0

D

47

Convert 1 cm3 to Å3.
A) 1024
B) 10-24
C) 1030
D) 10-30
E) 10-9

A

48

Solids have a ________ shape and are ________.
A) definite, compressible
B) definite, incompressible
C) indefinite, compressible
D) indefinite, incompressible
E) sharp, convertible

B

49

________ is the chemical symbol for elemental sodium.
A) S
B) W
C) So
D) Na
E) Sn

D

50

If matter is uniform throughout and cannot be separated into other substances by physical processes, but can be decomposed into other substances by chemical processes, it is called a(n) ________.
A) heterogeneous mixture
B) element
C) homogeneous mixture
D) compound
E) mixture of elements

D

51

A separation process that depends on differing abilities of substances to form gases is called ________.
A) filtration
B) solvation
C) distillation
D) chromatography
E) All of the above are correct.

C

52

The initial or tentative explanation of an observation is called a(n) ________.
A) law
B) theory
C) hypothesis
D) experiment
E) test

C

53

A statement or mathematical equation which is based on repeated observations is called a(n) ________.
A) law
B) theory
C) hypothesis
D) experiment
E) test

A

54

The SI unit for mass is ________.
A) kilogram
B) gram
C) pound
D) troy ounce
E) none of the above

A

55

A difference in one degree of temperature is the smallest on the ________ temperature scale.
A) Kelvin
B) Celsius
C) Fahrenheit
D) Kelvin and Celsius
E) Fahrenheit and Celsius
Answer: C

C

56

________ is the abbreviation for the prefix mega-.
A) k
B) m
C) M
D) n
E) d

C

57

________ is the abbreviation for the prefix milli-.
A) k
B) m
C) M
D) n
E) d

B

58

A common English set of units for expressing velocity is miles/hour. The SI unit for velocity is ________.
A) km/hr
B) km/s
C) m/hr
D) m/s
E) cm/s

D

59

The density of a gold nugget is 19.3 g/cm3. If the volume of the gold nugget is 0.00369 L, the mass of the nugget is ________ g.
A) 71.2
B) 0.191
C) 19.3
D) 5.23
E) none of the above

A

60

The length of the side of a cube having a density of 12.6 g/ml and a mass of 7.65 g is ________ cm.
A) 0.607
B) 0.847
C) 1.18
D) 1.65
E) 4.58

B

61

The unit of force in the English measurement system is lb·ft/s2. The SI unit of force is the Newton, which is ________ in base SI units.

A) g·cm/s2
B) kg·m/hr2
C) kg·m/s2
D) g·m/s2
E) g·cm/s

C

62

The SI unit for momentum is ________.

A) kg·m/s
B) kg·m/hr
C) g·m/s
D) g·km/s
E) kg·km/hr

A

63

The SI unit of temperature is ________.
A) K
B) °C
C) °F
D) t
E) T

A

64

The freezing point of water at 1 atm pressure is ________.
A) 0 °F
B) 0 K
C) 0 °C
D) -273 °C
E) -32 °F

C

65

A temperature of ________ K is the same as 63 °F.
A) 17
B) 276
C) 290
D) 29
E) 336

C

66

1 nanometer = ________ picometers
A) 1000
B) 0.001
C) 1 × 10-6
D) 1 × 106
E) 10

A

67

1 picometer = ________ centimeters
A) 1 × 1010
B) 1 × 10-10
C) 1 × 108
D) 1 × 10-8
E) 1 × 10-12

B

68

1 kilogram = ________ milligrams
A) 1 × 10-6
B) 1,000
C) 10,000
D) 1,000,000
E) none of the above

D

69

"Absolute zero" refers to ________.
A) 0 Kelvin
B) 0° Fahrenheit
C) 0° Celsius
D) °C + 9/5(°F - 32)
E) 273.15 °C

A

70

The density (in g/cm3) of a gold nugget that has a volume of 1.68 cm3 and a mass of 32.4 g is ________.
A) 0.0519
B) 19.3
C) 54.4
D) 0.0184
E) 32.4

B

71

A certain liquid has a density of 2.67 g/cm3. 1340 g of this liquid would occupy a volume of ________ L.
A) 1.99 × 10-3
B) 50.2
C) 3.58
D) 35.8
E) 0.502

E

72

A certain liquid has a density of 2.67 g/cm3. 30.5 mL of this liquid would have a mass of ________ Kg.
A) 81.4
B) 11.4
C) 0.0875
D) 0.0814
E) 0.0114

D

73

Osmium has a density of 22.6 g/cm3. The mass of a block of osmium that measures 1.01 cm × 0.233 cm × 0.648 cm is ________ g.
A) 6.75 × 10-3
B) 3.45
C) 148
D) 6.75 × 103
E) 34.5

B

74

3.337 g/cm3 = ________ kg/m3
A) 3.337 × 10-9
B) 3.337 × 10-5
C) 3337
D) 0.3337
E) 333.7

C

75

What is the volume in cm3 of a perfect cube if one edge length measures 1.95 m?
A) 3.80 × 106
B) 7.41 × 106
C) 3.80
D) 7.41
E) 195

B

76

A cube has a volume of 856 mL. What would be the length of one edge (in cm)?
A) 856
B) 9.49
C) 94.9
D) 9.49 × 10-2
E) 29.3

B

77

45 m/s = ________ km/hr
A) 2.7
B) 0.045
C) 1.6 × 102
D) 2.7 × 103
E) 1.6 × 105

C

78

A baseball is thrown at a velocity of 98.4 miles per hour. What is the speed in m/s?
A) 1.59 × 105
B) 5.72 × 108
C) 2.65 × 103
D) 44.1
E) 2.21 × 102

D

79

The correct answer (reported to the proper number of significant figures) to the following is ________.

6.3 × 3.25 = ________
A) 20.
B) 20.475
C) 20.48
D) 20.5
E) 21

A

80

The correct answer (reported to the proper number of significant figures) to the following is ________.

(2.01)(6.936) / 12 = ________
A) 1.1618
B) 1.2
C) 1.16
D) 1.162

B

81

The correct answer (reported to the proper number of significant figures) to the following is ________.

12.75 × 1.3621 = ________
A) 17.367
B) 17.40
C) 17.37
D) 17.4
E) 17.0

C

82

The correct answer (reported to the proper number of significant figures) to the following is ________.

(12.67 + 19.2)(3.99) / (1.36 + 11.366) = ________
A) 9.99851
B) 9.9985
C) 9.999
D) 1.00 × 101
E) none of the above

D

83

The number 1.00430 has ________ significant figures.
A) 2
B) 3
C) 5
D) 6
E) 4
Answer: D

D

84

The correct result (indicating the proper number of significant figures) of the following addition is ________.

12
1.2
0.12
+ 0.012

A) 13
B) 13.3
C) 13.33
D) 13.332
E) none of the above

A

85

The correct result (indicating the proper number of significant figures) of the following problem is ________.

(0.002843)(12.80184)/0.00032

A) 113.73635
B) 113.736
C) 113.74
D) 113.7
E) 1.1 × 102

E

86

The correct result (indicating the proper number of significant figures) of the following calculation of the molecular mass forH2SO4 is ________.

4 × 15.9994 + 32.066 + 2 × 1.0079

A) 98.08
B) 98.079
C) 98.074
D) 98.838
E) 98.84

B

87

The volume of a regular cylinder is V =πr2h. What is the volume (cm3) of a cylinder of radius 2.34 cm and height 19.91 cm expressed to the correct number of significant figures?
A) 342.49471
B) 342.495
C) 342.49
D) 343
E) 342

E

88

There are ________ significant figures in the answer to the following computation:

(29.2 - 20.0)(1.79 x 105)/1.39

A) 1
B) 2
C) 3
D) 4
E) 5

B

89

There should be ________ significant figures in the answer to the following computation.

(10.07 + 7.395)/2.5

A) 1
B) 2
C) 3
D) 4
E) 5

B

90

________ significant figures should be retained in the result of the following calculation.

(11.13 - 2.6) x (3.8 x 104)/(103.05 + 16.9) x (1.2 x 10-6)

A) 1
B) 2
C) 3
D) 4
E) 5

B

91

The density of a 167.4 g sample of magnesium having a volume of 96.32 mL is ________ g/cm3.
A) 0.5754
B) 16120
C) 3.625
D) 25.26
E) 1.738

E

92

A 210. lbs person is required to take a medication at a dose of 5.00 mg per kg of body weight twice a day. How much medication would the person take in a 24 hour period? (Indicate the number in proper scientific notation with the appropriate number of significant figures.)
A) 2.10 × 103
B) 1.05 × 103
C) 4.77 × 102
D) 9.55 × 102
E) 9.55 × 101

D

93

The density of mercury is 13.6 g/cm3. The density of mercury is ________ kg/m3.
A) 1.36 × 10-2
B) 1.36 × 104
C) 1.36 × 108
D) 1.36 × 10-5
E) 1.36 × 10-4

B

94

The distance from the Earth to the Moon is approximately 240,000 miles. If a rocket travels at a speed of 7.50 km/sec, it will take ________ days to travel between the Earth and Moon.
A) 0.60
B) 6.0
C) 0.23
D) 33.5
E) 5.6

A

95

1.55 kg/m3 is equivalent to ________ g/L.
A) 1.55 × 10-3
B) 1.55 × 103
C) 1.55 × 10-6
D) 1.55 × 106
E) 1.55

E

96

An iron mine produces 2.18 × 105 US tons of raw ore on a daily basis which contains 21.47% elemental iron. How many pounds of elemental iron would the mine produce over a span of one year? (Assume the mine operates 365 days per year.) (1 US ton = 2000 lbs.)
A) 1.59 × 1011
B) 7.96 × 107
C) 3.42 × 1010
D) 1.71 × 107
E) 4.68 × 104

C

97

A 4.369 g sample of metal is placed in a flask. Water is added to the flask and the total volume in the flask is read to be 126.4 ml. The mass of the water, flask, and metal is 268.5 g. If the mass of the flask is 139.3 g and the density of water is 1.000 g/mL, the density of the solid is ________ g/cm3.
A) 0.366
B) 1.56
C) 0.641
D) 2.78
E) 3.21

D

98

The quantity 1.0 mg/cm2 is the same as 1.0 × ________ kg/m2.
A) 10-4
B) 102
C) 10-6
D) 10-2
E) 104

D

99

A rectangular water tank is 14.5 cm long and 4.63 cm wide. If 368.5 g of water completely fills the tank, the height of the tank is ________ cm. (Assume the density of water is 1.000 g/ml.)
A) 0.182
B) 5.49
C) 24700
D) 29.1
E) 165

B

100

There are ________ ng in a pg.
A) 0.001
B) 1000
C) 0.01
D) 100
E) 10

A

101

One edge of a cube is measured and found to be 13 cm. The volume of the cube in m3 is ________.
A) 2.2 × 10-3
B) 2.2 × 10-6
C) 2.2
D) 2.2 × 103
E) 2.2 × 106

A

102

The density of lead is 11.4 g/cm3. The mass of a lead ball with a radius of 0.50 mm is ________ g. (Vsphere = 4πr3/3)
A) 6.0
B) 4.6 × 10-2
C) 4.6 × 10-5
D) 6.0 × 10-3
E) 4.6

D

103

In the following list, only ________ is not an example of matter.
A) book
B) heat
C) flower
D) mouse
E) neon

B

104

The symbol for the element platinum is ________.
A) K
B) P
C) Pt
D) S
E) Ca

C

105

The element hydrogen has the symbol ________.
A) H
B) He
C) K
D) B
E) Ar

A

106

Which one of the following has the element name and symbol correctly matched?
A) Ne, nitrogen
B) Si, sulfur
C) Ca, carbon
D) Be, beryllium
E) None of the symbols are correctly matched to the element name.

D

107

Which one of the following is a pure substance?
A) tap water
B) rock
C) air
D) elemental oxygen
E) apple

D

108

The symbol for the element neon is ________.
A) Rb
B) Si
C) Mg
D) Mn
E) Ne

E

109

The symbol for the element sodium is ________.
A) Me
B) Hg
C) Sn
D) Na
E) Pb

D

110

Express the temperature, 275.18 K, in degrees Celsius.
A) 548.33 °C
B) 274.17 °C
C) 2.03 °C
D) 120.88 °C
E) 22.78 °C

C

111

The temperature of 25 °C is ________ in Kelvins.
A) 103
B) 138
C) 166
D) 248
E) 298

E

112

An object will sink in a liquid if the density of the object is greater than that of the liquid. The mass of a sphere is 9.83 g. If the volume of this sphere is less than ________ cm3, then the sphere will sink in liquid mercury (density = 13.6 g/cm3).
A) 0.723
B) 1.38
C) 134
D) 7.48
E) none of the above

A

113

What decimal power does the abbreviation d represent?
A) 1 × 10-2
B) 10
C) 1 × 10-9
D) 1 × 10-1
E) 1 × 103

D

114

An object measuring 25.0 inches will have a length of ________ centimeters.
A) 63.5
B) 9.84
C) 0.0158
D) 0.102
E) 2.54

A

115

An object measuring 0.4500 kilograms will have a mass of ________ grams.
A) 450.0
B) 0.0004500
C) 45.00
D) 4.500
E) 2222

A

116

An object measuring 77 milliliters will have a volume of ________ liters.
A) 0.077
B) 77000
C) 13
D) 7700
E) 770

A

117

An object measuring 0.76 decimeters will have a length of ________ centimeters.
A) 7.6
B) 0.076
C) 0.0076
D) 1100
E) 0.00076

A

118

The prefix giga is represented by the following notation ________.
A) 1 × 10-1
B) 1 × 10-3
C) 1 × 10-9
D) 1 × 109
E) 1 × 103

D

119

A temperature of 290. K is the same as ________ °F.
A) 63
B) 81
C) 260
D) 711
E) 351

A

120

A temperature of 10.00 °C is the same as ________ °F.
A) 50.00
B) 32.18
C) -12.22
D) 283.15
E) -263.15

A

121

A temperature of 100. °F is the same as ________ °C.
A) 38
B) 212
C) 700.
D) 373
E) -173

A

122

A temperature of 55.0 °F is the same as ________ °C.
A) 12.8
B) 131.0
C) 32.0
D) 328.2
E) -218.2

A

123

Which of the following mass measurements is the smallest?
A) 78 kg
B) 78 mg
C) 78 pg
D) 78 fg
E) 78 ng

D

124

Which of the following mass measurements is the largest?
A) 123.20 Mg
B) 123.20 dg
C) 123.20 g
D) 123.20 Tg
E) 123.20 Gg

D

125

What is the volume (in cm3) of a 36.7 g piece of metal with a density of 6.95 g/cm3?
A) 5.28
B) 255
C) 0.189
D) 6.34
E) 1.74

A

126

The density of silver is 10.5 g/cm3. A piece of silver with a mass of 61.3 g would occupy a volume of ________ cm3.
A) 0.171
B) 644
C) 10.5
D) 0.00155
E) 5.84

E

127

A cube of an unknown metal measures 0.250 cm on one side. The mass of the cube is 0.095 g. Which of the following is most likely the unknown metal?

Metal/Density (g/cm3)

rhodium/12.4
copper/8.96
niobium/8.57
vanadium/6.11
zirconium/6.51

A) zirconium
B) rhodium
C) vanadium
D) copper
E) niobium

C

128

Gold has a density of 0.01932 kg/cm3. What volume (in cm3) would be occupied by a 22.2 g sample of gold?
A) 0.429
B) 0.870
C) 0.000429
D) 16.81
E) 1.15

E

129

Gold has a density of 0.01932 kg/cm3. What is the mass (in kg) of a 92.5 cm3 sample of gold?
A) 1.79
B) 0.560
C) 92.5
D) 0.000209
E) 4790

A

130

The density of silver is 10.5 g/cm3. A piece of silver that occupies a volume of 42.5 cm3 would have a mass of ________ g.
A) 446
B) 0.247
C) 7.64
D) 4.05
E) 23.6

A

131

The correct answer (reported to the proper number of significant figures) to the following is ________.

7.3 × 4.68 = ________

34

132

The correct answer (reported to the proper number of significant figures) to the following is ________.

(1501-1496) × (9.18 × 3.68) = ________

200

133

If an object weighs 38.325 lbs, what would be the mass in grams? (2.20 lbs = 1 kg)

17400

134

Which of the following has the same number of significant figures as the number 0.0050?
A) 0.9
B) 4.0
C) 1.00
D) 601
E) 99.000

B

135

How many Significant Figures does the number 0.005000 have?
A) 4
B) 5
C) 1
D) 2
E) 3

A

136

The number 0.0101 has ________ significant figures.
A) 2
B) 3
C) 5
D) 4
E) 6

B

137

In which one of the following numbers are none of the zeros significant?
A) 10.0
B) 103
C) 161.00
D) 0.00050
E) 0.009

E

138

Round the number 0.00637 to two significant figures.
A) 0.0064
B) 0.006
C) 0.00637
D) 0.0
E) 0.0063700

A

139

How many significant figures are in the number 30.80?
A) 3
B) 4
C) 0
D) 1
E) 2

B

140

How many significant figures are in the measurement 5000 g?
A) 4
B) 2
C) 3
D) 1
E) 5

D

141

The number with the most significant zeros is ________.
A) 0.08
B) 0.00090
C) 90.300
D) 0.008001
E) 591

C

142

What would be the volume of a box that measures 1.12 m × 1.00 m× 0.69 m?
A) 0.772800
B) 0.77
C) 0.773
D) 0.7728
E) 0.77280

B

143

The estimated costs for remodeling the interior of an apartment are: three 1-gallon cans of paint at $15.44 each, two paint brushes at $12.22 each, and $145 for a helper. The total estimated cost with the appropriate significant figures is
A) 215.76
B) 2.2 × 102
C) 216
D) 2 × 102
E) 215.8

C

144

Round the following number to four significant figures and express the result in standard exponential notation: 0.00222755
A) 0.2228 × 10-2
B) 0.002228
C) 2.228 × 103
D) 2.228 × 10-3
E) 22.28 × 102

D

145

The quantity ________ m is the same as 4 km.
A) 4000
B) 400
C) 0.004
D) 0.04
E) 40

A

146

How many liters of wine can be held in a wine barrel whose capacity is 30.0 gal?
A) 1.26 × 10-4
B) 0.126
C) 114
D) 7.93 × 103
E) 7.93

C

147

The recommended adult dose of Elixophyllin, a drug used to treat asthma, is 6.00 mg/kg of body mass. Calculate the dose in milligrams for a 134-lb person.
A) 10.1
B) 1773
C) 13.2
D) 365
E) 3.6 × 105

D

148

The density of air under ordinary conditions at 25 °C is 1.19 g/L. How many kilograms of air are in a room that measures 9.0ft x 11.0ft and has an 10.0 ft ceiling?
A) 2.99
B) 0.124
C) 3.34 × 104
D) 0.0644
E) 33.4

E

149

Which of the following liquids has the greatest density?
A) 13cm3 with a mass of 23 g
B) 3.5cm3 with a mass of 10 g
C) 0.022cm3 with a mass of 0.10 g
D) 54cm3 with a mass of 45 g
E) 210cm3 with a mass of 12 g

C

150

An inert atmosphere was obtained by adding nitrogen in a room that measures 11.0ft x 11.0ft and has a 8.00 ft ceiling. How many liters of nitrogen were used to fill the room?

1 in. = 2.54cm (exactly); 1L = 103cm3

A) 2.74 × 104
B) 102
C) 29.5
D) 2.95 × 107
E) 9.14 × 105

A

151

Gases do not have a fixed ________ as they are able to be ________.

volume, compressed

152

The symbol for the element phosphorus is ________.

P

153

Sn is the symbol for the element ________.

Tin

154

Si is the symbol for the element ________.

Silicon

155

Cu is the symbol for the element ________.

Copper

156

Mass and volume are often referred to as ________ properties of substances.

extensive

157

1 milligram = ________ micrograms

1,000

158

1.035 × 10-4 L = ________ mL

0.1035

159

Water is considered to be a diatomic molecule because it is composed of two different atoms

false

160

A scientific law is a concise statement or an equation that summarizes a broad variety of observations.

true

161

3.2 cm3 = 0.0032 L

true

162

Temperature is a physical property that determines the direction of heat flow.

true

163

There are 6 significant figures in the number 0.003702.

false