# Express the answers to the following calculations in

• NGCSUPER
• 5
• 100% (1) 1 out of 1 people found this document helpful

This preview shows page 2 - 4 out of 5 pages.

Express the answers to the following calculations in scientific notation: (12 points)1.145.75 + (2.3 × 10–1)1.1457.5 × 10–1 + 2.3 × 10–1= 1459.8 × 10–12.79,500 ÷ (2.5 × 102)1.79.500 × 103 \ 2.5 × 102= 31.8 × 103-2 = 31.8 × 103.(7.0 × 10–3) – (8.0 × 10–4)1.70.0 × 10–4– 8.0 × 10-4= 62.0 × 10–44.(1.0 × 104) × (9.9 × 106)1
10
4.What is the number of significant figures in each of the following measurements? (8 points)5.4867 mii.46.56 mLi.27.60,104 toni.58.2900 gi.4 or 29.40.2 g/cm3i.310. 0.0000003 cmi.111. 0.7 mini.112. 4.6 × 1019atomsi.2(Reference: Chang 1.33)5.Express the results in the proper number of significant figures. (12 points)6.5.6792 m + 0.6 m + 4.33 mi.10.6092 m = 10.6 m 7.3.70 g – 2.9133 g i.0.7867 g = 0.79 g8.4.51 cm × 3.6666 cmi.16.536366 cm = 16.5 cm9.(3 × 104g+ 6.827g)/(0.043 cm3– 0.021 cm3)2Copyright © 2017 by Thomas Edison State University. All rights reserved.
3
6.Carry out the following conversions: (16 points)7.22.6 m to dm
8.25.4 mg to kilograms
• • • 