Page 71 - Chemistry--atom first
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Chapter 1 | Essential Ideas 61
52. Round off each of the following numbers to two significant figures:
(a) 517
(b) 86.3
(c) 6.382 103
(d) 5.0008
(e) 22.497
(f) 0.885
53. Perform the following calculations and report each answer with the correct number of significant figures. (a) 628 342
(b) (5.63 102) (7.4 103) (c)
(d) 8119 0.000023
(e) 14.98 + 27,340 + 84.7593
(f) 42.7 + 0.259
54. Perform the following calculations and report each answer with the correct number of significant figures. (a) 62.8 34
(b) 0.147 + 0.0066 + 0.012
(c) 38 95 1.792
(d) 15 – 0.15 – 0.6155
(e)
(f) 140 + 7.68 + 0.014
(g) 28.7 – 0.0483
(h)
