Chapter 2worksheetKEY

Chapter 2worksheetKEY - 67.85 e. 5.6983 x 10-4 5.698 x 10-4...

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Chapter 2: Worksheet Name: KEY CHM 1025 1. How many significant figures are in the following? a. 100 1, 2, 3 b. 32.07 4 c. 1200.34 6 d. 5678900.002 10 e. 156900 4, 5, 6 f. 0.00256 3 g. 0.00549000 6 h. 1.3 x 10 -3 2 i. 5.789 x 10 5 4 j. 000123 3 k. 000568.005 6 l. 45893 5 m. 760.34 5 n. 5600.0 5 o. 5600 2, 3, 4 2. Change the following into or out of scientific notation a. 4500.2 4.5002 x 10 3 b. 2.356 x 10 -3 .002356 c. 0.0000568 5.68 x 10 -5 Chapter 2 Page 1
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d. 892.3002 8.923002 x 10 2 e. 0.005812 5.812 x 10 -3 f. 4.69 x 10 -5 .0000469 g. 6.91 x 10 4 69100 h. 0.0015975 1.5975 x 10 -3 i. 8.56 x 10 2 856 j. 100.156 1.00156 x 10 2 3. Round the following to 3 sig figs (you may have to put your answer in scientific notation) a. 156.998 157 b. 4.5850001 4.59 c. 5.325000 5.33 d. 689.3 689 e. 6.949 x 10 5 6.95 x 10 5 f. 8.231 x 10 -4 8.23 x 10 -4 g. 568972 5.69 x 10 5 h. 4650000 4.65 x 10 6 4. Round the following to 4 sig figs (you may have to put your answer in scientific notation) a. 123456 1.235 x 10 5 b. 45.689 45.69 Chapter 2 Page 2
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c. 58.55555 58.56 d. 67.84500
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Unformatted text preview: 67.85 e. 5.6983 x 10-4 5.698 x 10-4 f. 4.5000023 x 10 7 4.500 x 10 7 g. 7.85651 x 10 3 7.857 x 10 3 h. 159753 1.598 x 10 5 5. Calculate the following (remember that the answer has to have the right # of sig figs and that you will probably have to round to get the correct # of sig figs) a. 32.76 + 1.3 = 34.1 b. 568.56 + 0.3359 = 568.90 c. 45 + 12.3 = 57 d. 1012.5 + 56 = 1069 e. 78.5 5.23 = 73.3 f. 14569 5.123 = 14564 g. 89.26 3.0 = 86.3 h. 75-52.658 = 22 i. 56.2 * 8956 = 5.03 x 10 5 j. 0.0056 * 68.987 = .39 k. 0.125008 * 23 = 2.9 l. 1.56 x 10-3 * 56.68 = .0884 m. 9.956 x10 5 * 5.24 x 10 3 = 5.22 x 10 9 n. 4.68 / 2.3 = 2.0 o. 56.89 / 0.0268 = 2.12 x 10 3 Chapter 2 Page 3 p. 54 / .002359 = 2.3 x 10 4 q. 5.28 x10-8 / 4.23 x 10-11 = 1.25 x 10 3 r. 1200.26 / 478.00095 = 2.51100 Chapter 2 Page 4...
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This note was uploaded on 10/20/2011 for the course CHEM 1025 taught by Professor Smith during the Spring '10 term at Valencia.

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Chapter 2worksheetKEY - 67.85 e. 5.6983 x 10-4 5.698 x 10-4...

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