posted by Tim .
Mass of flask = 81.39g
Mass of flask and water = 104.26g
Mass of flask ,water,and solute =129.53
Mass of solute= 25.27g
Boiling point of water =98.7C
Boiling point of solution =109.5C
Calculate the molecular weight of the solute using the data.
M=Kb*r solute/delta Tb*kg solvent
delta T = Kb*molality
Solve for molality.
molality = moles/kg solvent
Solve for moles
moles = grams/molar mass
solve for molar mass.