Question

find the molality of solution if 120g of urea is present in 1000ml solution. if density of solution is 1,12g/ml​

Answer 1

Explanation:

Moles of urea =12/60=0.2

Moles of sucrose =68.4/342=0.2

(molar mass of sucrose is 342gm )

Since there are equal moles of solute in equal volumes of water, the mole fraction is same.

As per Raoult's law, the relative lowering of pressure is also same.