Lab Room Barometric pressure Boiling point of solvent 76.4 cmHg 100.9C 101.50 g Mass of empty flask NaCl solution Mass of flask and water Mass of flask, water, and NaCl Boiling point of NaCl solution 249.38 g 279.92 g 104.8C Ethylene glycol solution Mass of flask and water Mass of flask, water and ethylene glycol Boiling Point of solution 200.22 g 253.98 g 104.6C Unknown solution Unknown number Mass of flask and water Mass of flask, water, and unknown Boiling point of solution #24 248.43 g 288.76 g 104.6C Determination of the molar mass of ethylene glycol Weight of water g Weight of added ethylene glycol: 53.69 g Boiling Point of Solution: 104.6 C MW of ethylene glycol g/mol I Determination of the molar mass of an unknown solute Unknown number 8 Weight of water Weight of added unknown solute 8 Boiling Point of Solution " MW of unknown solute g/mol