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.
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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.
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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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