Exam_1 - HOUR EXAM I /Version A CHEN 1211 Profs. George &...

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HOUR EXAM I /Version A CHEN 1211 Monday, Sept. 20, 2010 7:15PM to 8:15PM Answer all questions on the scantron answer sheet by filling in the proper bubble with a number 2 pencil. If you change your answer, please erase the undesired mark thoroughly. Be sure to fill in the boxes for your student number, name and lab section; then fill in the corresponding bubbles beneath them correctly. A periodic table with atomic numbers and masses is attached to the back of this exam. There are 5 exam pages and 12 questions. The last question asks for the version of your exam. Check to be sure you have answered all the questions. Please note the point values of each question. Useful Information: Avogadro's Number = 6.022 x 10 23 mol -1 Number of Moles = Concentration x Volume 1 kg = 1000 g 1 gallon = 3.7854 L 1 L = 1000 mL 1 amu = 1.6605 x 10 -24 g 1
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1. (7 Points) A sample of oil has a density of 0.85 g/mL. What is the mass of 3.00 barrels of oil in kilograms (kg) if a barrel of oil is 42.0 gallons? You are given that 1 gallon is equal to 3.8754 L. (a) 451 kg (b) 514 kg (c) 489 kg (d) 987 kg (e) 1353 kg 2. (7 Points) What is the volume of the solution that would result by diluting 70.00 mL of 0.0913 M NaOH to a concentration of 0.0150 M ?
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Exam_1 - HOUR EXAM I /Version A CHEN 1211 Profs. George &...

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