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18 Nov 2019
Advance Study Assignment: Molar Mass of a Volatile Liquid 1. A student weighs an empty nask and stopper and finds the mass to be 53.256 g. She then adds about 5 mL of an unknown liquid and heats the flask in a boiling water bath at 98.8 C. After all the liquid is vaporized, she removes the flask from the bath, stoppen it, and lets it cool. After it is cool, Nhe momen- tarily removes the stopper, then replaces it and weighs the flask and condensed vapor, obtaining a mass of 5378 og The volume of the flask is known to be 231.1 ml The absolute atmospheric pressure in the laboratory that day is 728 mm Hg. a What was the pressure of the vapor in the nask in atan? a b What was the temperature of the vapor in K?the volume of the flask in liters? K v L c. What was the mass of condensed vapor that was present in the flask? grams d. How many moles of condensed vapor were present? in moles e. What is the mass of one mole of vapor (Eq. 2? MM grmole (continued on following page)
Advance Study Assignment: Molar Mass of a Volatile Liquid 1. A student weighs an empty nask and stopper and finds the mass to be 53.256 g. She then adds about 5 mL of an unknown liquid and heats the flask in a boiling water bath at 98.8 C. After all the liquid is vaporized, she removes the flask from the bath, stoppen it, and lets it cool. After it is cool, Nhe momen- tarily removes the stopper, then replaces it and weighs the flask and condensed vapor, obtaining a mass of 5378 og The volume of the flask is known to be 231.1 ml The absolute atmospheric pressure in the laboratory that day is 728 mm Hg. a What was the pressure of the vapor in the nask in atan? a b What was the temperature of the vapor in K?the volume of the flask in liters? K v L c. What was the mass of condensed vapor that was present in the flask? grams d. How many moles of condensed vapor were present? in moles e. What is the mass of one mole of vapor (Eq. 2? MM grmole (continued on following page)
timothystarkLv9
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Sixta KovacekLv2
11 Aug 2019
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