6. State the number of significant digits in each of the following measurements.

Question

6. State the number of significant digits in each of the following measurements. (a) 5.00 cm (c) 0.500g (e) 50.0 mL (g) 50.5°C (b) 0.50 cm (d) 0.005g () 5.5 mL (h) -0.5 °C 7. Perform the indicated math operation and round off the answer to the proper significant digits. (b) 97.5 g b)95.826s 50.511 g 8. Perform the indicated math operation and round off the answer to the proper significant digits. 15.15 cm3 12.0 cm2 (a) (5.15 cm) (2.25 cm) (1.0 cm) (b) Explain why you round off the numbers in a calculator display after addition, subtraction, multiplication, or division of measurements. 9. 10. (optional) A platinum cylinder has a mass of 1.000 kg, a diameter of 3.90 cm, and a height of 3.90 cm. What is the volume of the cylinder in grams per cubic centimeter? The volume of a cylinder equals d2h14, where is 314, d is the diameter, and h is the height.

Explanation / Answer

6.

a. 5.00cm has 3 significant figures

b. 0.50 cm has 2 significant figures

c. 0.500 g has 3 significant figures

d. 0.005 g has 1 significant figure

e. 50.0ml has 3 significant figures

f. 5.5ml has 2 significant figures

g. 50.50c has 3 significant figures

h. -0.50c has one significant figure

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