10g of an organic substance when dissolved in two litres of water gave an osmotic pressure of 0.59 atm, at 7^(@)C. Calculate the molecular weight of the substance.

10g of an organic substance when dissolved in two litres of water gave

1.	10g of an organic substance when dissolved in two litres of water gave an osmotic pressure of 0.59 atm, at 7^(@)C. Calculate the molecular weight of the substance.
Answer» Solution :`PI=("MOLES of solute")/("LITRES of solution")xxRT` `0.59=(10xx0.082xx280)/(Mxx2)` `M=(10xx0.82xx280)/(2xx0.59)="194.6 g/mol"` `"Molecular WEIGHT = 194.6 g/mole"`