<p>MR. SURRETTE VAN NUYS HIGH SCHOOL</p><p>CHAPTER 1: MEASUREMENT AND THE SCIENTIFIC METHOD WORKSHEET SOLUTIONS</p><p>1. 0.00000937 1A. 9.37 x 10-6</p><p>2. 237.7 x 103 2A. 2.377 x 105</p><p>3. 479 x 10-5 3A. 4.79 x 10-3</p><p>4. 0.00754 x 106 4A. 7.54 x 103</p><p>5. 2.654 5A. 2.65</p><p>6. 0.0347 6A. 3.47 x 10-2</p><p>7. 49.371 7A. 4.94 x 101</p><p>8. 1.485 8A. 1.49</p><p>9. How many significant figures in 5037? 9A. 4</p><p>10. 0.00057 has how many significant figures? 10A. 2</p><p>1 | P a g e CHEMISTRY MR. SURRETTE VAN NUYS HIGH SCHOOL</p><p>11. 0.01003 has how many significant figures? 11A. 4</p><p>12. 10 pennies has how many significant figures? 12A. Unlimited</p><p>13. 19.667 – (5.4 x 0.916) 13A. (1) 19.667 – (5.4 x 0.916) (2) 19.667 – (4.9464) (3) 14.7206 (4) 14.7</p><p>14. 4.89 + 2.745 14A. (1) 4.89 + 2.745 (2) 7.635 (3) 7.64</p><p>15. 103.37 g / 20.5 mL 15A. (1) 103.37 g / 20.5 mL (2) 5.042439024 g /mL (3) 5.04 g / mL </p><p>16. 35.45 mL – 30.5 mL 16A. (1) 35.45 mL – 30.5 mL (2) 4.95 mL (3) 5.0 mL</p><p>17. Convert 6.87 fm to Tm. 17A. 6.87 fm x 1 m x 1 Tm 1015 fm 1012 m</p><p>= 6.87 x 10-27 Tm</p><p>18. Convert 1.25 ft to m. 18A. 1.25 ft x 12 in x 2.54 cm x 1 m = 0.381 m 1 ft 1 in 100 cm </p><p>2 | P a g e CHEMISTRY MR. SURRETTE VAN NUYS HIGH SCHOOL</p><p>19. Convert 0.000347 mm into nm. 19A. 3.47 x 10-4 mm x 1 m x 10 9 nm = 347 nm 103 mm 1 m</p><p>20. Convert 0.0000347 mm into inches. 20A. 3.47 x 10-4 mm x 1 m x 100 cm x 1 in 103 mm 1 m 2.54cm = 1.37 x 10-5 in</p><p>3 | P a g e CHEMISTRY MR. SURRETTE VAN NUYS HIGH SCHOOL</p><p>CHAPTER 1: MEASUREMENT AND THE SCIENTIFIC METHOD QUIZ SOLUTIONS</p><p>Questions 1 - 4. How many significant figures do the following numbers have?</p><p>1. 380000000.0 1A. 9</p><p>2. 3.080 2A. 4</p><p>3. 12 inches in a foot 3A. unlimited</p><p>4. 0.00806 4A. 3</p><p>Questions 5 - 8. Write the following numbers in correct scientific notation with three sig. figs.:</p><p>5. 6.999919 x 10-4 5A. 7.00 x 10-4</p><p>6. 76000000 6A. 7.60 x 107</p><p>7. 0.0000456710 7A. 4.57 x 10-5</p><p>8. 3075.935 x 10-3 8A. 3.08</p><p>4 | P a g e CHEMISTRY MR. SURRETTE VAN NUYS HIGH SCHOOL</p><p>Questions 9 - 13. Express your final answer to these problems with correct sig. figs., and in scientific notation.</p><p>9. 2.398291 g + 69.045 g + 33.4 g 9A. (1) 2.398291 g + 69.045 g + 33.4 g (2) 104.843291 g (3) 104.8 g (4) 1.048 x 102 g</p><p>10. (1.89 x 10-2) (2.0 x 104) ------5.206 x 106 10A. (1) (1.89 x 10-2)(2.0 x 104) / (5.206 x 106) (2) 7.260852862 x 10-5 (3) 7.3 x 10-5</p><p>11. 52 ------8841.040 11A. (1) 52 / 8841.040 (2) 5.881661 x 10-3 (3) 5.9 x 10-3</p><p>12. (2.0 x 10-5 m)(108 m) ------(4.84 x 107 m)(10-4 sec) 12A. (1) (2.0 x 10-5 m)(108 m) / (4.84 x 107 m)(10-4 sec) (2) 0.4132231405 m/s (3) 4.132231405 x 10-1 m/s (4) 4.1 x 10-1 m/s</p><p>13. 1 ------294.672 mL – 120.4 mL 13A. (1) 1 / (294.672 mL – 120.4 mL) (2) 0.0057381564 / mL (3) 5.7381564 x 10-3 / mL (4) 6 x 10-3 / mL</p><p>5 | P a g e CHEMISTRY MR. SURRETTE VAN NUYS HIGH SCHOOL</p><p>Questions 14 - 16. Indicate the numerical value, in scientific notation, for the following prefixes of the metric system.</p><p>14. centi 14A. 10-2</p><p>15. milli 15A. 10-3</p><p>16. femto 16A. 10-15</p><p>Questions 17 - 20. Convert the following numbers into meters. Express your answer in scientific notation.</p><p>17. 4.01 nm 17A. 4.01 x 10-9 m</p><p>18. 3.79 cm 18A. 3.79 x 10-2 m</p><p>19. 2.8 Gm 19A. 2.8 x 109 m</p><p>20. 8.971 m 20A. 8.971 x 10-6 m</p><p>6 | P a g e CHEMISTRY</p>