12 points a 1 14598 x 10 2 b 2 318 x 10 3 c 70 10 3 80

# 12 points a 1 14598 x 10 2 b 2 318 x 10 3 c 70 10 3 80

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(12 points)a.145.75 + (2.3 × 10–1) 1.4598 x 102b.79,500 ÷ (2.5 × 102) 3.18 x 103c.(7.0 × 10–3) – (8.0 × 10–4) 7.8 x 10-3d.(1.0 × 104) × (9.9 × 106) 9.9 x 1010(Reference: Chang 1.31)1Copyright © 2017 by Thomas Edison State University. All rights reserved.
4.What is the number of significant figures in each of the following measurements? (8 points)(Reference: Chang 1.33)5.Express the results in the proper number of significant figures. (12 points)(Reference: Chang 1.35)6.Carry out the following conversions: (16 points)(Reference: Chang 1.39)7.The average speed of helium at 25°C is 1255 m/s. Convert this speed to miles per hour (mph). (4 points) 2807 mph(Reference: Chang 1.41)2Copyright © 2017 by Thomas Edison State University. All rights reserved.
8.How many minutes does it take light from the sun to reach Earth? (The distance from the sun to Earth is 93 million miles; the speed of light is 3.00 × 108m/s)(4 points)8 min and 20 s (Reference: Chang 1.43)9.Normal body temperature is 78.0°F. Calculate this temperature in degrees Celsius and Kelvin. (4 points)78.0of= 25.5oc = 298ok10. Bromine is a reddish-brown liquid. Calculate its density (in g/mL) if 586 g of the substance occupies 188 mL. (4 points) ) 3.20 x 10-1g/mL

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