A student weighs an empty flask and stopper and finds the mass to be 112 29 g She then adds 5 1 mL of an unknown liquid and

Question

A student weighs an empty flask and stopper and finds the mass to be 112 29 g She then adds 5 1 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 stoppers it and lets it cool After it is cool she momentarily removes the stopper then replaces it and weighs the flask and condensed vapor obtaining a mass of 112 80 g The volume of the flask is known to be 250 0 mL The absolute atmospheric pressure in the laboratory that day is 756 mm Hg a What was the pressure of the vapor in the flask in atm P b What was the temperature of the vapor in K T atm What was the volume of the flask in liters V L c What was the mass of condensed vapor that was present in the flask m 9 K d How many moles of condensed vapor were present The gas constant R is 0 0821 L atm K mol PV RT n moles e What is the mass of one mole of vapor 772 71 MM MM g mol

Kunduz · Accepted Answer

Click to see the answer