Chapter One Problems_CHEM135

Chapter One Problems_CHEM135 - 3 )? 7. On July 23, 1983 an...

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Chapter One Problems CHEM 135 1. A marathon distance race covers a distance of 40.0 km. What is this distance in meters? In miles? 2. Some soft drinks are sold in bottles with a volume of 1.5 L. What is the volume in millilters? In cubic centimeters? In cubic decimeters? 3. Give the number of significant figures in each of the following numbers: a. 0.00546 b. 1600 c. 2.300 x 10 -4 d. 1.020 e. 1.6402 4. Carry out the following calculations and give the answer with the correct number of significant figures. a. (0.0546)(16.0000)(7.779/55.85) = ? b. (1.68)((23.56-2.3)/1.248 x 10 3 ) = ? 5. The aluminum in a package contains 75 ft 2 of kitchen foil weighs approximately 12 oz. Aluminum has a density of 2.70 g/cm 3 . What is the approximate thickness of aluminum foils in millimeters? (1 oz = 28.4 g) 6. Which occupies a larger volume, 600 g of water (with a density of 0.995 g/cm 3 ) or 600 g of lead (with a density of 11.34 g/cm
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Unformatted text preview: 3 )? 7. On July 23, 1983 an Air Canada Flight ran out of gas on the way from Montreal to Edmonton. The pilot knew that 22,300 kg of fuel was needed for the trip, and that they had 7682 L of fuel remaining in the tanks. The pilot asked for the density of the fuel and was told that it is 1.77, but the pilot did not recognize that the units for density were actually pounds/liter. Show the calculation the pilot should have used to correctly calculate the amount of fuel needed to fill the tank for the trip. 8. At 25 deg. C the density of water is 0.997 g/cm 3 , whereas the density of ice at (-) 10 deg. C is 0.917 g/cm 3 . If a soft drink can (volume 250 mL) is filled completely with pure water and then frozen at (-) 10 deg. C, what volume does the solid occupy? Can the ice be contained within the can? Explain....
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This note was uploaded on 02/12/2011 for the course CHEM 131 taught by Professor ... during the Fall '08 term at Maryland.

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