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# CHEM110Ch1Answers - Chapter 1 27 29 37 47 53 55 59 61 67 79...

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Chapter 1: 27, 29, 37, 47, 53, 55, 59, 61, 67, 79 27. a. 4867 miles, 4 sig. figs. b. 56 mL, 2 sig. figs. c. 60,104 tons, 5 sig. figs. d. 2900 g, 2, 3, or 4 sig. figs. In the following problems, the datum that sets the number of significant figures is in non-bold red. 29. a. 5.6792 m 0.6 m +4.33 m 10.6 m b. 3.70 g –2.9133 g 0.79 g c. 4.51 cm x 3.6666 cm = 16.5 cm 2 d. ( 3 x 10 4 g + 6.827 g) / (0.043 cm 3 – 0.021 cm 3 ) = 1 x 10 6 g/cm 3 37. a. 1 m ft x 3.28 6. ft 0 1.8 m 3 453.6 g 1 kg lb x x 1 lb 10 6 g 1 8 76.2 kg b. miles 5280 ft 1 m 1 km x x x 1 hr 1 mile 3.28 ft 1000 m 55 88 km/hr c. 10 3.0 x 10 cm 1 m 3.28 ft 1 mile 60 s x x x x x 1 s 100 cm 1 m 5280 1 ft 1 min 60 min x hr 1 hr 8 7 x 10 miles d. 3 6 0.62 g Pb x 6.0 x 10 g blood 10 g blood 3 3.7 x 10 g Pb 47. 3 2 2 1 cm (87.39 56.12) g H O x 0.9976 g H O 3 31.35 cm

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53. 11 3 3 3 3 3 3 3 7 3 x 10 g vanillin 1 L (2.54) cm (12) in x x x x 1 L air 1000 cm 1 in 1 ft \$112 x 10 ft x g (2 sig. figs. 2.0 5 ? .0 0 ) 5 \$0.063 6.3 c = ents 55. 21 2 g NaCl 1.03 g seawater 1000 mL x x x 1.5 x 1 3. 0 L x 10 g seawater 1 mL seawater 1 L 1 kg
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