Deck 4: How Chemists Use Numbers

Question 1

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

Answer 1

−321°F

Question 2

How many significant figures are in 0.006570?

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

Answer 2

4

Question 3

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

Answer 3

269.0 cm

Question 4

What unit would be most appropriate when reporting the volume 5.23 × 10⁻⁶ L?

A)mL
B)μL
C)kL
D)dL
E)ML

Question 5

Zero kelvin 0 K < 0°F < 0°C

Question 6

What unit would be most appropriate when reporting the volume 1.94 × 10⁻³ g?

A)mg
B)μg
C)kg
D)dg
E)Mg

Question 7

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 8

Write the value 4,710,000,000,000 in scientific notation.

A)4.710 × 10⁻¹¹
B)4.71 × 10⁺¹¹
C)4.71 × 10⁺¹²
D)4.710 × 10⁺⁹
E)4.71 × 10⁻¹²

Question 9

The SI prefix nano- (n) means

A)10⁻⁹
B)10⁻⁶
C)10⁻³
D)10⁺⁶
E)10⁺⁹

Question 10

Select the largest unit.

A)mg
B)μg
C)kg
D)dg
E)Mg

Question 11

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 12

The number 1.050 × 10⁹ has how many significant figures?

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

Question 13

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 14

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 15

Select the smallest unit.

A)mm
B)μm
C)nm
D)km
E)dm

Question 16

The SI prefix mega- (M) means

A)10⁻⁶
B)10⁻³
C)10³
D)10⁶
E)10⁹

Question 17

Write the value 15,360,000,000 in scientific notation.

A)1.536 × 10⁻¹¹
B)1.536 × 10⁺¹⁰
C)1.536 × 10⁺¹¹
D)1.536 × 10⁻⁶

Question 18

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 19

Write the value 0.000000000143 in scientific notation.

A)1.43 × 10⁻¹⁰
B)1.43 × 10⁻⁹
C)1.43 × 10⁺¹⁰
D)1.43 × 10⁺⁹
E)1.430 × 10⁻⁹

Question 20

Write the value 0.0000009620 in scientific notation.

A)9.620 × 10⁻⁶
B)9.62 × 10⁻¹³
C)9.62 × 10⁻¹²
D)9.62 × 10⁺⁷
E)9.620 × 10⁻⁷

Question 21

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 22

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 23

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 24

Select the answer that expresses the result of this calculation with the correct number of significant figures. 13.602 × 1.90 × 3.06
---------------------------
× 1)4097

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

Question 25

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 26

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

Question 27

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 28

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 29

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 30

Convert the measurement 2.887 cL to units of mL.

A)2.887 × 10¹ mL
B)2.887 × 10⁴ mL
C)2.887 × 10⁵ mL
D)2.887 × 10⁸ mL
E)2.887 × 10⁻⁸ mL

Question 31

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 32

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 33

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)5.2 × 10⁻³ mi/h

Question 34

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 35

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 36

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 37

Which is correct if 15,390,000 is 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 38

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 39

Convert 1,556.9 mm into units of km.

A)1.5569 × 10⁻⁶ km
B)1.5569 × 10¹ km
C)1.5569 × 10³ km
D)1.5569 × 10⁻³ km
E)1.5569 × 10⁹ km

Question 40

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 41

If an electron has an acceleration of 2.33 × 10² m/sec², what is this value in units of m/min²?

A)1.40 × 10⁴ m/min²
B)3.88 m/min²
C)2.33 × 10³ m/min²
D)6.47 × 10⁻² m/min²
E)8.39 × 10⁵ m/min²

Question 42

Convert 8.513 × 10⁵ mg/kL into units of ng/L.

A)8.513 × 10¹¹ ng/L
B)8.513 × 10⁸ ng/L
C)8.513 × 10² ng/L
D)8.513 × 10¹⁴ ng/L
E)8.513 × 10⁻¹⁰ ng/L

Question 43

A train is accelerating at a rate of 11.8 m/s².What is this rate in units of nm/ms²?

A)1.18 × 10⁻¹¹ nm/ms²
B)1.18 × 10⁻¹⁴ nm/ms²
C)1.18 × 10⁷ nm/ms²
D)1.18 × 10⁹ nm/ms²
E)1.18 × 10⁴ nm/ms²