5. In the Dumas method for determining the molar mass of an unknown volatile liquid, a sample of a volatile liquid that boils below 100°C is vaporized in a boiling water bath and the mass of the vapor required to fill the flask is determined. The following data was collected: Flask Volume Mass of Flask + Cap Mass of Flask+ Condensed Liquid Mass of Condensed Liquid Temperature of Water Bath (C) Barometric Pressure (atm) 100.0 + 100.0 + 79.6 mL 279.6 mL 143.85 g 144.95 g 1,10 g 84.1 °C 0.985 atm a. What is the molar mass of the unknown? b. What will its temperature be when the pressure is 1.20 atm and the volume is 250.0 mL? P

5. In the Dumas method for determining the molar mass of an unknown volatile liquid, a sample of a volatile liquid that boils below 100°C is vaporized in a boiling water bath and the mass of the vapor required to fill the flask is determined. The following data was collected: Flask Volume Mass of Flask + Cap Mass of Flask+ Condensed Liquid Mass of Condensed Liquid Temperature of Water Bath (C) Barometric Pressure (atm) 100.0 + 100.0 + 79.6 mL 279.6 mL 143.85 g 144.95 g 1,10 g 84.1 °C 0.985 atm a. What is the molar mass of the unknown? b. What will its temperature be when the pressure is 1.20 atm and the volume is 250.0 mL? P

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter9: Liquids And Solids

Section: Chapter Questions

Problem 64QAP

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