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Chapter 3 Scientific Measurement Review

Chapter 3 Scientific Measurement Review. Express 0.000 000 000 154 m in scientific notation. 1.54 x 10 -10 m. What is 5928 km expressed in scientific notation?. 5.928 x 10 3 km. What is the result of multiplying (2.5 x 10 10 m ) x (3.5 x 10 -7 m )?. 8.8 x 10 3 m 2.

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Chapter 3 Scientific Measurement Review

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  1. Chapter 3Scientific MeasurementReview

  2. Express 0.000 000 000 154 m in scientific notation. • 1.54 x 10-10 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 m) x (3.5 x 10-7 m)? • 8.8 x 103 m2

  5. Which of the following is NOT a quantitative measurement: 5 liters, or very small? • Very small

  6. The closeness of a measurement to it’s true value is a measure of … • accuracy

  7. In the measurement 0.503 L, what digit is not known with certainty? 3

  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 111.009 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. • 1333 km

  15. Express the sum of 7.68 m and 5.0 m, using the correct sig. figs. • 12.7 m

  16. Express the product of 2.2 mm and 5.00 mm, using the correct number of significant figures. • 11 mm

  17. Express the product of (4.0 x 10-2 m) x (8.1 x 102 m) • 32m

  18. 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 7.30 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 • 0.00044 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 m expressed in cm? • 0.75 cm

  24. What is 7896 mm expressed in m? • 7.896 m

  25. A nanosecond is how many seconds: 10-6 s, or 10-9 s? • 10-9 s

  26. 78 Liters is equal to how many cubic centimeters? • 78 L = 78000 mL • 78000 mL = 78000 cm3

  27. Express 987 milligrams in grams. • 0.987 g

  28. The chief advantage of the metric system over other systems of measurement is that it … • Uses powers of 10

  29. Which is NOT an official SI unit: kilogram, liter, or mole • liter

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

  31. Convert -32°C to Kelvin 241 K

  32. The actual mass of a certain compound is 1.420 g. You calculate the mass in your lab work as 1.38 g. What is your percent error? • 2.82%

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

  34. A rectangular block of lead measures 20.0 mm x 30.0 mm x 45.0mm. If the density of Pb is 11.34 g/cm3, calculate the mass of the block. • 306 g

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

  36. What is the volume of 344 g of ice, if the density is 0.92 g/mL? • 370 mL

  37. The pressure reading from a barometer is 742 mm Hg. Express this reading in kilopascals, kPa. (Use dimensional analysis to solve. 760 mm Hg = 1.013 x 105 Pa) • 98.9 kPa

  38. It’s almost here….

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