1 the nonvolatile nonelectrolyte estrogen estradiol

Question

1) The nonvolatile, nonelectrolyte estrogen (estradiol), C₁₈H₂₄O₂ (272.4 g/mol), is soluble in ethanol, CH₃CH₂OH. 

Calculate the osmotic pressure (in atm) generated when 13.2 grams of estrogen are dissolved in 263 mL of a ethanol solution at 298 K. 

________ atm

2) The ionic compound Na₂Cr₂O₇ is soluble in water. Calculate the osmotic pressure (in atm) generated when 17.5 grams of sodium dichromate are dissolved in 87.4 mL of an aqueous solution at 298 K. The van't Hoff factor for Na₂Cr₂O₇ in this solution is 2.54.

_________ atm

3) In a laboratory experiment, a student found that a 112-mL aqueous solution containing 2.379 g of a compound had an osmotic pressure of 31.3 mm Hg at 298 K. The compound was also found to be nonvolatile and a nonelectrolyte. What is the molar mass of this compound?

 __________g/mol