posted by Ryan on .
An aqueous KNO3 solution is made using 82.7 grams of KNO3, diluted to a total solution volume of 1.50 L. The density of this solution is 1.05 g/mL. What is the molality of this solution?
moles KNO3 = grams/molar mass
Solve for moles.
mass soln = volume x density = ??
mass H2O = total mass soln - mass solute.
molality = moles/kg solvent
so correct me if i may be wrong...
I agree but you have too many significant figures. You're allowed only 3.