answers_exam_3_sp99

answers_exam_3_sp99 - Chem 2, Spring 1999 Dr. Harrison EXAM...

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Chem 2, Spring 1999 EXAM #3 Name_________________ Dr. Harrison R = 0.0821 L atm/mol K 1. (10 pts) Calculate the grams of nitrogen gas in a 552 mL flask at 23.2˚ C and 1.2 atm. 0.76 g 2. (10 pts) Consider that nitric acid decomposes to form nitrogen dioxide (gas), oxygen (gas), and water (liquid). a) Write and balance the reaction. 4HNO 3 4NO 2 + O 2 + 2H 2 0 b) If 12.2 g nitric acid decompose in a 1.50 L flask at 26.0˚ C, what is resulting total pressure inside the flask? Assume that the vapor pressure of water at this temperature is 25.2 torr. 3.99 atm
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3. (10 pts) Initially a 4.50 L balloon of argon gas at 20.6˚ C and 1.43 atm is compressed to 2.25. L and the pressure is increased to 1.86 atm . Calculate the resulting temperature of the gas (report in Celsius). -82 ° C 4. (8 pts) Assume you dissolve 22.3 g of sodium sulfate into 498 mL of water. The resulting solution has a volume of 502 mL. The density of water is 1.00 g/mL. a) Calculate the concentration (mass/mass %) of the solution.
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This note was uploaded on 09/02/2011 for the course CHEM 2 taught by Professor Harrison during the Spring '11 term at West Valley.

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answers_exam_3_sp99 - Chem 2, Spring 1999 Dr. Harrison EXAM...

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