Exam 1 Chem 200 Practice Exam.pdf

Exam 1 Chem 200 Practice Exam.pdf - Exam 1 Fall 2004...

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1 Exam 1 CHEMISTRY 200 100Points Fall, 2004 Name________________________________________________ SHOW YOUR WORK FOR FULL CREDIT!!!! Helpful hints: 453.59 g/pound, 1.0567 qt/liter, 1 kg = 2.20 lb, 16 ounces = 1 lb, 2.54 cm/in., 1 ounce = 28.4 g, 1 inch = 2.54 cm, 1 mile = 1.609 km. 1. If there are 2.62 10 22 atoms in 1.00 g of sodium and they are lined up side by side, what is the length of the line of sodium atoms in miles? Assume that the atoms are spheres of radius 0.186 nm. (10) 2. You discovered a piece of matter that looks like gold, d = 19.28 g/cm 3 , but may be fool's gold, d = 5.02 g/cm 3 . The sample mass is 112 grams. When placed in a graduated cylinder containing 35.8 mL of water, the water level rises to 41.6 mL. Calculate the density of the sample and identify it. (5) 3. An aluminum foil package contains 95 ft 2 of foil and the foil has a weight of 26.0 ounces. The density of aluminum is 2.70 g/cm 3 . Calculate the thickness of the foil in mm. (15)
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2 4. You can identify a metal by carefully determining its density. A 0.608 g piece of an unknown metal is 0.367 cm long, 0.552 cm wide, and 0.250 cm thick. What is the identity of the element? (10) 5. A comfortable hot-tub temperature is 100.0
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  • Fall '16
  • Dr. Behrang Madani
  • Chemistry

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