Appendix 1 & 2 Review

Appendix 1 & 2 Review - 8 905 8 925 8 x-d 4326 705...

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CHEM 142B – Winter 2012 Problems for Extra Practice Scientific Notation, Significant Figures and Unit Conversions 1. Convert the following Celsius temperatures to Kelvin a. Normal human body temperature, 37.00 ºC b. Boiling point of N 2 , -196.00 ºC c. Melting point of gold, 1064.00 ºC 2. The temperature on the surface of our sun is about 6.3 x 10 3 ºC. Convert this temperature to degrees Fahrenheit. 3. How many significant figures are there in each of the following? a. 542.5083 b. 0.0340 c. 500 d. 500. e. 4 x 10 8 f. 5.05 x 10 -15
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4. Perform the following mathematical operations and express the result to the correct number of significant figures. a. (6.404 x 2.91)/(18.7-17.1) b. 1.0028 + 0.221 + 0.10337 c. . 100 925
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Unformatted text preview: . 8 905 . 8 925 . 8 x-d. 4326 . 705 . 80 623 . 470 . 1 . 3 526 . 2 + + 5. The speed of light is 3.0 x 10 8 m/s. How many miles does light travel in 1 hour? 6. Perform the following conversions. a. 8.43 cm to millimeters b. 2.31 x 10 2 cm to meters c. 294.5 nm to centimeters d. 1.445 x 10 4 m to kilometers e. 903.3 nm to micrometers 7. A rectangular solid measures 1.0 m by 5.6 cm by 2.1 dm. Express its volume in cubic meters, liters, and cubic inches. 8. A sample containing 33.42 g of metal pellets is poured into a graduated cylinder initially containing 12.7 mL of water, causing the water level in the cylinder to rise 21.6 mL. Calculate the density of the metal....
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Appendix 1 & 2 Review - 8 905 8 925 8 x-d 4326 705...

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