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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?

  • Chem -

    moles KNO3 = grams/molar mass
    Solve for moles.

    mass soln = volume x density = ??

    mass H2O = total mass soln - mass solute.

    molality = moles/kg solvent

  • Chem -

    so correct me if i may be wrong...





  • Chem -

    I agree but you have too many significant figures. You're allowed only 3.

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