Deck 1: Chemistry: the Central Science

Question 1

A dose of medication was prescribed to be 35 microliters. Which of the following expresses that volume in centiliters?

A) 3.5 × 10⁵ cL
B) 3.5 × 10⁴ cL
C) 3.5 cL
D) 3.5 × 10^-4 cL
E) 3.5 × 10^-3 cL

Answer 1

3.5 × 10^-3 cL

Question 2

The distance between carbon atoms in ethylene is 134 picometers. Which of the following expresses that distance in meters?

A) 1.34 × 10^-13 m
B) 1.34 × 10^-12 m
C) 1.34 × 10^-10 m
D) 1.34 × 10^-7 m
E) 1.34 × 10^-6 m

Answer 2

1.34 × 10^-10 m

Question 3

Which of the following is not an SI base unit?

A) Meter
B) Ampere
C) Second
D) Gram
E) Kelvin

Answer 3

Gram

Question 4

How many hertz is 600.11 MHz?

A) 6.0011 × 10^-4 Hz
B) 60.011 Hz
C) 6.0011 × 10⁶ Hz
D) 6.0011 × 10^-2 Hz
E) 6.0011 × 10⁸ Hz

Question 5

The SI prefixes milli- and mega- represent, respectively:

A) 10⁶ and 10^-6
B) 10^-3 and 10⁶
C) 10³ and 10^-6
D) 10^-3 and 10⁹
E) 10^-6 and 10^-3

Question 6

What is a unifying principle that explains a body of experimental observations?

A) Law
B) Hypothesis
C) Theory
D) Phenomena
E) Prediction

Question 7

The SI base unit of mass is

A) mg.
B) g.
C) kg.
D) metric ton.
E) lb.

Question 8

The SI prefix mega- (M) means

A) 10^-6.
B) 10^-3.
C) 10³.
D) 10⁶.
E) 10⁹.

Question 9

The average distance between the Earth and the Moon is 240,000 miles. Express this distance in kilometers. (1 mi = 1609 m)

A) 6.1 × 10⁵ km
B) 5.3 × 10⁵ km
C) 3.9 × 10⁵ km
D) 1.5 × 10⁵ km
E) 9.4 × 10⁴ km

Question 10

Which of the following does not have a uniform composition throughout?

A) Element
B) Compound
C) Homogeneous mixture
D) Heterogeneous mixture
E) Solvent

Question 11

How many milliliters is 0.0055 L?

A) 0.55 mL
B) 5.5 mL
C) 0.5 mL
D) 0.0000055 mL
E) 182 mL

Question 12

Which of the following activities is not a part of good science?

A) Proposing a theory
B) Developing a hypothesis
C) Making quantitative observations
D) Designing experiments
E) Indulging in speculation

Question 13

Which of the following is a 'substance' according to the definition given in your textbook?

A) Air
B) Tap water
C) Sea water
D) Water
E) Toothpaste

Question 14

What is the term used for findings that are summarized based on a pattern or trend?

A) Law
B) Hypothesis
C) Theory
D) Phenomena
E) Prediction

Question 15

Which of the following is a tentative explanation for a set of observations?

A) Law
B) Hypothesis
C) Theory
D) Phenomena
E) Prediction

Question 16

Which of the following cannot be separated into simpler substances by chemical means?

A) Element
B) Emulsion
C) Compound
D) Homogeneous mixture
E) Heterogeneous mixture

Question 17

Which of these quantities represents the largest mass?

A) 2.0 × 10² mg
B) 0.0010 kg
C) 1.0 × 10⁵ μg
D) 2.0 × 10² cg
E) 10.0 dg

Question 18

How many micrograms are in 65.3 kg?

A) 0.653 μg
B) 6.53 × 10⁷ μg
C) 6.53 × 10⁴ μg
D) 6.53 × 10^-8 μg
E) 6.53 × 10¹⁰ μg

Question 19

If a liquid contains 60% sugar and 40% water throughout its composition then what is it called?

A) Solute
B) Compound
C) Homogeneous mixture
D) Heterogeneous mixture
E) Solvent

Question 20

The mass of a sample is 550 milligrams. Which of the following expresses that mass in kilograms?

A) 5.5 × 10⁸ kg
B) 5.5 × 10⁵ kg
C) 5.5 × 10^-4 kg
D) 5.5 × 10^-6 kg
E) 5.5 × 10^-1 kg

Question 21

If normal body temperature is 98.6°F then what is this in degrees Celsius?

A) 34°C
B) 35.5°C
C) 36.4°C
D) 37.0°C
E) 38.7°C

Question 22

The average distance between the Earth and the Moon is 240,000 miles. Express this distance in meters. (1 mi = 1609 m)

A) 6.1 × 10⁵ m
B) 5.3 × 10⁵ m
C) 3.9 × 10⁸ m
D) 1.5 × 10⁵ m
E) 9.4 × 10⁴ m

Question 23

How many inches are in 382.5 cm? (1 in = 2.54 cm)

A) 150.6 in
B) 6.641 × 10^-3 in
C) 151 in
D) 971.6 in
E) 972 in

Question 24

How many inches are in 382.5 cm? (1 in = 2.54 cm)?

A) 150.6 in
B) 6.641 × 10^-3 in
C) 151 in
D) 971.6 in
E) 972 in

Question 25

What is the volume of a container that contains 14.3 g of a substance having a density of 0.988 g/cm³?

A) 14.1 cm³
B) 0.0691 cm³
C) 14.5 cm³
D) 141 cm³
E) 691 cm³

Question 26

Isopropyl alcohol, commonly known as rubbing alcohol, boils at 82.4°C. What is the boiling point in kelvins?

A) 387.6 K
B) 355.6 K
C) 323.6 K
D) 190.8 K
E) -190.8 K

Question 27

Acetic acid boils at 244.2°F. What is its boiling point in degrees Celsius?

A) 382.0°C
B) 167.7°C
C) 153.4°C
D) 117.9°C
E) 103.7°C

Question 28

Given that 1 inch = 2.54 cm, 1.00 cm³ is equal to

A) 16.4 in³.
B) 6.45 in³.
C) 0.394 in³.
D) 0.155 in³.
E) 0.0610 in³.

Question 29

How many mm³ are in 16.7 cm³?

A) 1.67 × 10^-5 mm³
B) 1.67 × 10^-8 mm³
C) 1.67 × 10⁷ mm³
D) 1.67 × 10⁴ mm³
E) 1.67 × 10^-4 mm³

Question 30

The boiling point for liquid helium is 4.0 K. What is the temperature in degrees Fahrenheit?

A) -452.5°F
B) -498.9°F
C) -237.2°F
D) 131.8°F
E) 530.9°F

Question 31

The boiling point for liquid nitrogen is 77 K. What is the temperature in degrees Fahrenheit?

A) -127°F
B) -289°F
C) -321°F
D) 177°F
E) 662°F

Question 32

How many cubic inches are in 1.00 liter? (1 in = 2.54 cm)

A) 61.0 in³
B) 155 in³
C) 394 in³
D) 1.64 × 10⁴ in³
E) none of them

Question 33

A large pizza has a diameter of 15 inches. Express this diameter in centimeters. (1 in = 2.54 cm)

A) 38 cm
B) 24 cm
C) 18 cm
D) 9.3 cm
E) 5.9 cm

Question 34

If a patient in the hospital is running a temperature of 39.5°C, what is this in degrees Fahrenheit?

A) 99°F
B) 101.3°F
C) 102.4°F
D) 103.1°F
E) 104°F

Question 35

If the temperature is 38.0°F then what is the temperature in kelvins?

A) 3.33 K
B) 100.4 K
C) 276.5 K
D) 311.15 K
E) 235.15 K

Question 36

Acetone, which is used as a solvent and as a reactant in the manufacture of Plexiglas®, boils at 56.1°C. What is the boiling point in degrees Fahrenheit?

A) 159°F
B) 133°F
C) 101°F
D) 69.0°F
E) 43.4°F

Question 37

If you have a graduated cylinder containing 15.5 mL of water and this volume increases to 95.2 mL after a piece of metal with a mass of 7.95 g is dropped into the graduated cylinder, then what is the density of the metal?

A) 0.0835 g/mL
B) 0.513 g/mL
C) 0.0718 g/mL
D) 10.0 g/mL
E) 9.97 × 10^-2 g/mL

Question 38

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 is within 2°F of the right answer.

Question 39

What is the volume in milliliters of a 32.0 fl oz can of juice? (1 fl oz = 29.6 mL)

A) 1.08 mL
B) 947 mL
C) 0.925 mL
D) 0.95 mL
E) 1.1 mL

Question 40

Express 122.0°F in °C.

A) 50.0°C
B) 64.4°C
C) 67.8°C
D) 162.0°C
E) 219.6°C

Question 41

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 × 60. yds to a depth of 1.0 mm? (1 inch = 2.54 cm)

A) 76 kg
B) 47 Mg
C) 7.6 × 10⁵ g
D) 4.7 × 10⁸ g
E) 1.9 × 10⁷ g

Question 42

Which one of these represents a chemical change?

A) Boiling water to form steam
B) Turning hair yellow with bleach
C) Melting butter
D) Mixing powdered charcoal and oxygen at room temperature
E) Cutting a bar of sodium metal into pieces with a knife

Question 43

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

Question 44

The city of Los Angeles is now approximately 2400 miles south of Anchorage, Alaska. It is moving slowly northward as the San Andreas fault slides along. If Los Angeles is to arrive near Anchorage in 76 million years, at what average rate will it have to move in mm per month? (1 mi = 1609 m)

A) 2.0 × 10^-10 mm/mo.
B) 6.6 × 10^-6 mm/mo.
C) 4.2 mm/mo.
D) 9.5 mm/mo.
E) 51 mm/mo.

Question 45

Which one of these represents a physical change?

A) Water, when heated, 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.

Question 46

The density of mercury, the only metal to exist as a liquid at room temperature, is 13.6 g/cm³. What is that density in pounds per cubic inch? (1 in = 2.54 cm; 1 lb = 454 g)

A) 849 lb/in³
B) 491 lb/in³
C) 376 lb/in³
D) 0.491 lb/in³
E) 1.83 × 10^-3 lb/in³

Question 47

Talc is a mineral with low conductivity for heat and electricity which is not attacked by acid. It is used in talcum powder and face powder. Suppose a sample of talc weighs 13.65 g with a density of 1.75 g/cm³ in mineral oil. If this same sample of talc in air weighs 35.97 g, assuming no volume change, what is the density of the talc sample in air?

A) 4.61 g/cm³
B) 2.82 g/cm³
C) 2.63 g/cm³
D) 2.44 g/cm³
E) 1.61 g/cm³

Question 48

The speed needed to escape the pull of Earth's gravity is 11.3 km/s. What is this speed in mi/h? (1 mile = 1609 m)

A) 65,500 mi/h
B) 25,300 mi/h
C) 18,200 mi/h
D) 1,090 mi/h
E) 5.02 × 10^-3 mi/h

Question 49

A flask has a mass of 78.23 g when empty and 593.63 g when filled with water. When the same flask is filled with concentrated sulfuric acid, H₂SO₄, its mass is 1026.57 g. What is the density of concentrated sulfuric acid? (Assume water has a density of 1.00 g/cm³ at the temperature of the measurement.)

A) 1.992 g/cm³
B) 1.840 g/cm³
C) 1.729 g/cm³
D) 1.598 g/cm³
E) 0.543 g/cm³

Question 50

Which of the following is an example of an observation?

A) Gases expand as their temperature increases because the gas molecules are moving more rapidly.
B) Paraffin wax begins to melt at 57°C.
C) Three samples of wax are heated to 75°C.
D) The force acting on an object is equal to its mass times its acceleration.
E) Will all waxes melt at the same temperature?

Question 51

The mask of an empty flask is 17.4916 g, and its mass when filled with water at 20.0°C (density = 0.9982 g/mL) is 43.9616 g. The density of "heavy water" at 20.0°C is 1.1053 g/mL. What is the mass of the flask 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

Question 52

Some molecules move with speeds approaching the "escape velocity" from Earth, which is 7.0 miles per second. What is this speed in cm/h? (1 mi = 1609 m)

A) 313 cm/h
B) 4.1 × 10⁵ cm/h
C) 4.1 × 10⁹ cm/h
D) 1.1 × 10⁶ cm/h
E) 1.6 × 10⁹ cm/h

Question 53

Which of the following speeds is the greatest? (1 mi = 1609 m)

A) 40 mi/h
B) 2.0 × 10⁵ mm/min
C) 40 km/h
D) 0.74 km/min
E) 400 m/min

Question 54

The diameter of Earth is 12.7 Mm. Express this diameter in centimeters.

A) 1.27 × 10⁵ cm
B) 1.27 × 10⁶ cm
C) 1.27 × 10⁷ cm
D) 1.27 × 10⁸ cm
E) 1.27 × 10⁹ cm

Question 55

Which of these 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 601°C.

Question 56

Which of the following is an extensive property of oxygen?

A) Boiling point
B) Temperature
C) Average kinetic energy of molecules
D) Density
E) Mass

Question 57

Radio waves travel at the speed of light, which is 3.00 × 10⁸ m/s. How many kilometers will a radio message to outer space travel in exactly one year? (365.24 days = 1 y)

A) 9.46 × 10¹⁵ km
B) 7.30 × 10⁸ km
C) 7.10 × 10¹⁰ km
D) 9.47 × 10¹² km
E) 3.33 × 10^{- 3} km

Question 58

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 × 10^-2 min
B) 1.6 × 10⁵ min
C) 4.0 × 10¹⁵ min
D) 44 min
E) 2.6 min

Question 59

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? ((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

Question 60

Which of the following is a chemical change?

A) Boiling water
B) Melting wax
C) Broiling a steak on a grill
D) Condensing water vapor into rainfall
E) Carving a piece of wood

Question 61

You prepare 1000. mL of tea and transfer it to a 1.00 quart pitcher for storage. Which of the following statements is true? (1 L = 1.0567 qt)

A) The pitcher will be filled to 100% of its capacity with no tea spilled.
B) The pitcher will be filled to about 95% of its capacity.
C) The pitcher will be filled to about 50% of its capacity.
D) The pitcher will be completely filled and a small amount of tea will overflow.
E) The pitcher will be completely filled and most of the tea will overflow.

Question 62

50.0 grams of acetic acid are required for an experiment. What volume, in milliliters, of a 1.105 g/cm³ acetic acid solution must be measured for the experiment?

A) 0.0452 mL
B) 45.2 mL
C) 55.3 mL
D) 0.452 mL
E) 4.52 mL

Question 63

A geology student found an irregularly shaped rock, with a mass of 28.63 grams, and placed it into a graduated cylinder containing 13.31 mL of water. If the water level increased to 19.73 mL after the rock was placed in the cylinder, what is the density of the rock, in g/mL?

A) 4.46 g/mL
B) 4460 g/mL
C) 2.20 g/mL
D) 0.455 g/mL
E) 44.6 g/mL

Question 64

Which of the following properly expresses 0.01234 in scientific notation?

A) 1.234 × 10^-3
B) 12.3 × 10⁴
C) 1 × 10^-1
D) 1.234 × 10²
E) 1.234 × 10^-2

Question 65

How many significant figures are in 0.006570?

A) 3
B) 4
C) 5
D) 6
E) 7

Question 66

If the density of corn syrup is 1.380 g/mL and a sample of corn syrup has a mass of 32 grams, what is the volume of corn syrup, in liters?

A) 43 L
B) 23 L
C) 0.043 L
D) 0.023 L
E) 2.3 L

Question 67

The dark meat of a 20-pound turkey requires an internal temperature of 180°F to be fully cooked. What minimum temperature reading should be displayed on a food thermometer that only measures in degrees Celsius?

A) 82°C
B) 354°C
C) 261°C
D) -192°C
E) -310°C

Question 68

Which of the following is an extensive property?

A) Density
B) Temperature
C) Mass
D) Specific Heat
E) Pressure

Question 69

A smart phone has dimensions of 4.9 inches (height), 2.3 inches (width) and 8.0 millimeters (depth). What is the volume of the smart phone in cubic centimeters? (1 in = 2.54 cm)

A) 58 cm³
B) 1.7 x 10⁵ cm³
C) 90 cm³
D) 3.4 cm³
E) 34 cm³

Question 70

Select the answer with the correct number of decimal places for the following sum: 13.914 cm + 243.1 cm + 12.00460 cm =

A) 269.01860 cm
B) 269.0186 cm
C) 269.019 cm
D) 269.02 cm
E) 269.0 cm

Question 71

The number 1.050 × 10⁹ has how many significant figures?

A) 2
B) 3
C) 4
D) 9
E) 13

Question 72

The result of (3.8621 × 1.5630) - 5.98 is properly written as

A) 0.06.
B) 0.056.
C) 0.0565.
D) 0.05646.
E) 0.056462.

Question 73

What is the length of the box, using the proper number of significant figures and units?

A) 5.5 cm
B) 5 cm
C) 6 cm
D) 5.67 cm
E) 5.6 cm

Question 74

Which of the following correctly expresses 52.068881 in scientific notation, rounded to three significant figures?

A) 5.21 × 10^-1
B) 5.20 × 10^-1
C) 5.21 × 10¹
D) 5.20 × 10¹
E) 5.21 × 10²

Question 75

Which choice correctly expresses 15,390,000 rounded to two significant figures?

A) 15
B) 1.5 × 10^-7
C) 1.5 × 10⁸
D) 15,400,000
E) 15,000,000

Question 76

After carrying out the operation (13.7 + 0.027) ÷ 8.221, how many significant figures are appropriate to show in the result?

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

Question 77

An average Mastiff puppy weighs 2.72 kilograms. How many pounds does an average Mastiff puppy weigh? (1 lb = 453.6 g)

A) 1.24 lb
B) 10.0 lb
C) 59.8 lb
D) 6.00 lb
E) 72.0 lb

Question 78

When the value of something does not depend on the amount of the matter then what is this called?

A) Empirical property
B) Intensive property
C) Inclusive property
D) Extensive property
E) Exclusive property

Question 79

How many significant figures does the sum 8.5201 + 1.93 contain?

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

Question 80

Select the answer that expresses the result of this calculation with the correct number of significant figures.

A) 13.3568
B) 13.357
C) 13.36
D) 13.4
E) 13