# Kilogram and Significant Figures

1. Which is not an example of pure substance?

A. Sugar

B. Air

C. Aluminum foil

D. Water

2. Which is an example of physical change?

A. The rusting of an iron nail

B. The burning of propane in a gas grill

C. Baking cookies

D. Polishing tarnished silver

E. Melting of an ice cube in a glass of soda

3. Which measurement has the fewest number of significant figures? A. 12.80 m

B. 0.1280 m

C. 0.001280 m

D. 1280 m

4. Which quantity is an exact number?

A. 3 cars

B. 1,000 m

C. 2 L

D. 453.6 g

5. The number 0.0035880 expressed correctly using scientific notation is A. 0.0035889.

B. 3.5880 × 103.

C. 3.5880 × 10–3.

D. 3.5880 × 10–4.

6. The measurement 78,005,760 expressed correctly using scientific notation is A. 7.8005760 × 107.

C. 7.8 × 107.

D. 7.800576 × 10–7.

E. 7.800576 × 107.

7. When 4.870 × 10–3 is correctly converted to its standard form the number becomes _____. A. 4870

C. 0.00487

D. 0.004870

E. 0.0004870

8. Which number is the largest?

A. 4.38 × 103

B. 4.38 × 102

C. 4.38 × 10–3

D. 4.38 × 10–2

E. 438

9. Which number is the smallest?

A. 4.38 × 103

B. 4.38 × 102

C. 4.38 × 10–3

D. 4.38 × 10–2

E. 438

10. When 0.022189 is correctly rounded to two significant figures the number becomes _____. A. 0.02

B. 0.022

D. 0.023

11. When 5.5490× 108 is correctly rounded to three significant figures the number becomes _____. A. 5.55

B. 5.55 × 108

D. 554

E. 5.54 × 108

12. Which number has four significant figures?

A. 3.978

B. 0.780

C. 0.0085

13. What is the correct answer to this calculation, reported using the proper number of significant figures: 38.251 + 73.1? A. 111

B. 111.3

C. 111.4

D. 111.35

14. What is the correct answer to this calculation, reported using the proper number of significant figures: 549.101 + 8.12 + 95.0076 – 651.9? A. 3.286

B. 0.3286

C. 0.33

D. 0.3

E. 1268.1

15. What is the correct answer to this calculation, reported using the proper number of significant figures: 38.251 × 73.1? A. 2796.1481

B. 2796.15

C. 2796.1

D. 2796

E. 2.80 × 103

16. What is the correct answer for the following calculation, reported using the proper number of significant figures: [pic]? A. 6.3278

B. 6.328

C. 6.33

D. 6.3

17. What is the metric relationship between milliliters and microliters? A. 1 milliliter = 1 microliter

B. 1,000 milliliters = 1 microliter

C. 1 milliliter = 1,000 microliters

18. Which metric relationship is correct?

A. 1 milliliter = 1,000 liters

B. 1 dL = 100 mL

C. 1,000 km = 1 m

19. Which is the proper conversion factor for converting pounds (lb) to grams (g)? A. [pic]

B. [pic]

C. [pic]

D. [pic]

21. What is the mass in kilograms of an individual who weighs 197 lb? A. 197 kg

B. 8.91 kg

C. 89.1 kg

28. A child had a body temperature of 101.8 °F. What is her body temperature in °C? A. 24.6 °C

B. 38.8 °C

C. 38.78 °C

D. 56.56 °C

E. 311.9 °C

31. Which of the following temperatures is the highest?

A. 32 °C

B. 32 °F

C. 32 K

33. What is the density of a sample of rubbing alcohol if it has a specific gravity of 0.789? A. 1.27 g/mL

B. 0.789 g/mL

C. 1.00 g/mL

D. 0.895 g/mL

34. Which of the answers for the following conversions contains the correct answer and the number of significant figures? A. [pic]

B. [pic]

C. [pic]

35. What is the mass in grams of 85.32 mL of blood plasma with a density of 1.03 g/mL? A. 85.32 mL

B. 82.83 mL

C. 82.8 mL

D. 87.88 mL

E. 87.9 mL

True/False:

42. The base unit for mass in the metric system is kilograms (kg). T/F

43. The base unit for volume in the metric system is liter (L). T/F

44. An inexact number results from a measurement or observation and contains some uncertainty. T/F

45. A zero does count as a significant figure when it occurs at the end of a number that does not have a decimal point. T/F

47. Specific gravity is a quantity that compares the density of a substance with...

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