Define Volatileliquid and Heats the Flask in a Boiling Water

A student observes that a 126 mL dry flask with a foil capweighs 50.162g. The student then adds 5 mL of an unknown volatileliquid and heats the flask in a boiling water bath at 99.2C(degrees) until all liquid disappears. The flask, foil, andunknown after heating that is dry and cool weigh 50.610 g. Thebarometric pressure in the laboratory is 743.3 mm Hg; thelaboratory temperature averages 22.3 C(degrees); the vapor pressureof the unknown liquid is 160 mmHg at 20 C(degrees), and the densityof dry air at STP is 1.2929 g/L.
b) Calculate the density of air at the experimental conditiosnidentified in part a.