How do I calculate the molality of a water solution?

Calculate the mole fraction, molarity and molality of NH3 if it is in a solution composed of 30.6 g NH3 in 81.3 g of H2O. The density of the solution is 0.982 g/mL and the density of water is 1.00 g/mL.

  • Answer:

    The mole fraction, molarity and molality of NH3 if it is in a solution composed of 30.6 g NH3 in 81.3 g of H2O, with the density of the solution is 0.982 g/mL and the density of water is 1.00 g/mL are: molarity is 15.8 M NH3, molality: 16.1 molal NH3, and mole fraction(NH3): 0.285.

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