1. Chapter 3 Scientific Measurement Review

2. Express 0.000 000 000 154 m in scientific notation.
1.54 x m

3. What is 5928 km expressed in scientific notation?
5.928 x 103 km

4. What is the result of multiplying (2.5 x 1010) x (3.5 x 10-7)?

5. Perform: (2.5 x 103) (3.5 x 102)
2.9 x 103

6. The closeness of a measurement to its true value is a measure of …
accuracy

7. In the measurement 0.503 L, what digit is not known with certainty?

8. How many significant figures in the measurement 0.0034 kg?2

9. How many significant figures in the measurement 40,500 mg?3

10. How many significant figures in the measurement 811.40 grams?5

11. Round mm to 4 sig. figs.
111.0 mm

12. Record the following measurements with the correct sig figs.

13. What is the measurement 1042 L rounded to two significant figures?
1.0 x 103 L

14. Express the sum of 1111 km and 222 km, using the correct sig. figs.

15. Express the sum of 7.68 m and 5.0 m, using the correct sig. figs.

16. Express the product of 2. 7 mm and 5
Express the product of 2.7 mm and 5.00 mm, using the correct number of significant figures.
14 mm

17. Express the product of (4.0 x 10-2 m) x (8.1 x 102 m)

18. Which group of measurements is the most precise. a) 2 g, 2
Which group of measurements is the most precise? a) 2 g, 2.5 g, 3 g b) 1 g, 3 g, 4 g a

19. Which is expressed to 3 significant figures: 0. 007 m, or 7
Which is expressed to 3 significant figures: m, or 7.30 x 10-7 km
7.30 x 10-7 km

20. Which contains 2 significant figures: 0.004 40 L, or 0.000 44 L

21. What quantity is represented by the metric system prefix deci-?
0.1

22. What is the metric system prefix for the quantity 0.000 001
micro

23. What is 0.0075 km expressed in µm?
7.5 x 106 µm

24. What is 7896 mm expressed in m?

25. 78 Liters is equal to how many cubic centimeters?
78 L = mL
78000 mL = cm3

26. Express 987g in pg
9.87 x 1014 pg

27. Which of the following is NOT correct: a) 1 cm3 = 1 mL b) 10 kg = 1 g c) 1000 mm = 1 m

28. Convert -32°C to Kelvin
241 K

29. The actual mass of a certain compound is 1. 420 g
The actual mass of a certain compound is g. You calculate the mass in your lab work as 1.38 g. What is your percent error?
2.8%

30. Which of the following volumes is the smallest: 1 milliliter, or 1 microliter

31. A rectangular block of lead measures 20. 0 mm x 30. 0 mm x 45. 0mm
A rectangular block of lead measures 20.0 mm x 30.0 mm x 45.0mm. If the density of Pb is g/cm3, calculate the mass of the block.
306 g

32. As the mass of a substance increases, the density of a given volume of that substance ...

33. What is the volume of 344 g of ice, if the density is 0.92 g/mL?

34. The pressure reading from a barometer is 742 mm Hg
The pressure reading from a barometer is 742 mm Hg. Express this reading in kilopascals, kPa. (Use dimensional analysis to solve mm Hg = x 105 Pa)
98.9 kPa