Name:    Practice Test-Measurement, Significant Figures

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.

1.

The density of acetic acid is 1.05 g/mL. What is the volume of 327 g of acetic acid?
 a. 2.91 x 10-3 mL b. 3.21 x 10-3 mL c. 2.62 x  102 mL d. 3.11 x  102 mL e. 3.43 x  102 mL

2.

The density of liquid mercury is 13.5 g/cm3. What mass of mercury will fill a 0.500 L container?
 a. 3.70 x  10-2 g b. 6.75 g c. 27.0 g d. 37.0 g e. 6.75 x  103 g

3.

You can identify a metal by carefully determining its density. A 8.44 g piece of an unknown metal is 1.25 cm long, 2.50 cm wide, and 1.00 cm thick. What is a possible identity of the element?
 a. nickel, 8.90 g/cm3 b. aluminum, 2.70 g/cm3 c. titanium, 4.54 g/cm3 d. zirconium, 6.51 g/cm3 e. chromium, 7.20 g/cm3

4.

Thermostats are often set to 68 °F. What is this temperature in Celsius?
 a. 2.0 x  101 °C b. 25 °C c. 38 °C d. 56 °C e. 7.0 x  102 °C

5.

The boiling point of liquid helium is 4 K. What is this temperature in Celsius?
 a. -294 °C b. -277 °C c. -269 °C d. -255 °C e. -169 °C

6.

Chemical reactions are often studied at 25 °C. What is this temperature in Fahrenheit?
 a. 45 °F b. 57 °F c. 68 °F d. 77 °F e. 103 °F

7.

Which one of the following is not a SI base unit?
 a. kilogram b. Fahrenheit c. Kelvin d. meter e. second

8.

Which of the following is the greatest mass?
 a. 2.3 x  109 pg b. 1.5 x  108 ng c. 6.6 x  105 mg d. 8.4 x  102 mg e. 3.0 x  10-1 g

9.

The radius of a helium atom is 31 pm. What is the radius in nanometers?
 a. 3.1 x  10-9 nm b. 3.1 x  10-6 nm c. 3.1 x  10-5 nm d. 3.1 x  10-3 nm e. 3.1 x  10-2 nm

10.

The dimensions of a box are 12 inch by 11 inch by 5.5 inch. Calculate the volume of the box in cm3. There is 2.54 cm per inch.
 a. 44 cm3 b. 2.8 x  102 cm3 c. 1.8 x  103 cm3 d. 4.7 x  103 cm3 e. 1.2 x  104 cm3

11.

If the fuel efficiency of an automobile is 27 miles per gallon, what is its fuel efficiency in kilometers per liter? (1 km = 0.621 mile, 1.000 L = 1.057 quarts, 4 quarts = 1 gallon)
 a. 11 km/L b. 14 km/L c. 17 km/L d. 63 km/L e. 180 km/L

12.

Which method is correct for determining the liters of gas required to fill an automobile's 15 gallon tank? (1.000 L = 1.057 quarts, 4 quarts = 1 gallon)
 a. 15 gallons b. 15 gallons c. 15 gallons d. 15 gallons e. none of the above

13.

An electronic balance is used to determine that a sample has a mass of 25.7171 g. If the balance's precision is ±0.1 mg, what is the correct number of significant figures for this measurement?
 a. 2 b. 3 c. 4 d. 5 e. 6

14.

Convert 5.000 x  10-2 meters to millimeters and express the answer in standard notation using the correct number of significant figures.
 a. 50 mm b. 50.0 mm c. 50.00 mm d. 500 nm e. 5000 mm

15.

What is the correct answer to the following expression: (72.61 - 68.59) x  18.76? Carry out the subtraction operation first.
 a. 7 x  101 b. 75 c. 75.4 d. 74.542 e. 75.5415

16.

What is the correct answer to the following expression: (18 + 95) x  0.077351? Carry out the addition operation first.
 a. 8.7 b. 8.74 c. 8.741 d. 8.7407 e. 8.74066

17.

What is the correct answer to the following expression: 2.97 x  10-5 + 6.13 x  10-3?
 a. 6.1 x  10-3 b. 6.16 x  10-3 c. 6.160 x  10-3 d. 6.1597 x  10-3 e. 6.15970 x  10-5

18.

When 24 copper pennies are submerged in water, the pennies displace 8.26 cm3 of water. If the combined mass of the pennies is 73.86 g, what is the density of copper?
 a. 0.112 g/cm3 b. 1.34 g/cm3 c. 8.94 g/cm3 d. 32.8 g/cm3 e. 107 g/cm3

19.

A gallon (3.78 L) of latex paint can cover 385 ft2 of the surface of a wall. What is the average thickness of one coat of paint (in micrometers)?
 a. 0.781 mm b. 3.22 mm c. 9.82 mm d. 32.2 mm e. 106 mm

20.

At 25 °C, the density of oxygen in air is 0.275 g/L. What volume is occupied by 25 kg of oxygen at 25 °C?
 a. 1.1 x  10-5 L b. 6.9 L c. 2.8 x  102 L d. 6.9 x  103 L e. 9.1 x  104 L