Unformatted text preview: 10th editions: p. 18. Example 1.1. Density = mass/volume 6. How many significant figures are there in the measurement of 6.124 x 10‐5? (a) 1 (b) 2 (c) 3 (d) 4 (e) 5 Hint: For 11th ed.: p.p. 19‐21, also Example 1.4(e). For both 9th and 10th editions: p.p. 23‐26. Memorize the rules. Example 1.4. 7. How many significant figures are appropriate to show in the result after carrying out the operation below? (223.7 + 0.27) ÷ 4.21 =? (a) 1 (b) 2 (c) 3 (d) 4 (e) 5 th
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Hint: For 11 ed.: p. 21. also p. 31: 1.35 (d) & 1.36(d). For both 9 and 10 editions: p. 25. Example 1.5. You need to memorize all the rules concerning the significant figures and the rules related to addition or subtraction and multiplication or division. Many students do not know the differences between addition/subtraction and multiplication/division. See two examples below: 1 Remember that the answers obtained from calculators are always WRONG when considering the significant figures. So when the question combining addition/subtraction...
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 Fall '11
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 Chemistry, pH, 11th ed.

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