Question

1. Calculate the molality of a 9.2 M solution of perchloric acid given that the density of this solution is 1.54 g/mL.

2. 0.344 g of a certain nonelectrolytic solute is dissolved in 2.71×10² mL of H₂O. The osmotic pressure of this solution is 2.24×10² torr at 21.0 °C. Calculate the molar mass of the solute. (760 Torr = 1 atm)

3. 0.102 g of an unknown non-electrolytic compound dissolved in 100. mL of water has an osmotic pressure of 28.1 mmHg at 20°C. Calculate the molar mass of the compound.

PLEASE ANSWER ALL 3

Answer 1