Significant Figures Exercises
- How many significant figures are contained in each of the following measurements?
(a) 38.7 g
(b) 2 × 1018 m
(c) 3,486,002 kg
(d) 9.74150 × 10−4 J
(e) 0.0613 cm3
(f) 17.0 kg
(g) 0.01400 g/mL
- How many significant figures are contained in each of the following measurements?
(a) 53 cm
(b) 2.05 × 108 m
(c) 86,002 J
(d) 9.740 × 104 m/s
(e) 10.0613 m3
(f) 0.17 g/mL
(g) 0.88400 s
- The following quantities were reported on the labels of commercial products. Determine the number of significant figures in each.
(a) 0.0055 g active ingredients
(b) 12 tablets
(c) 3% hydrogen peroxide
(d) 5.5 ounces
(e) 473 mL
(f) 1.75% bismuth
(g) 0.001% phosphoric acid
(h) 99.80% inert ingredients
- Round off each of the following numbers to two significant figures:
(a) 0.436
(b) 9.000
(c) 27.2
(d) 135
(e) 1.497 × 10−3
(f) 0.445
- 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
- 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
- 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)