Question

molality of pure liquid benzene if its density is 1.2 g/ml​

Answer 1

Explanation:

Given,

Density=1.2gm/ml

From this we can say that 1.2 gm of benzene 1 ml solution..

But as we had a pure liquid benzene Mass of solute

=mass of solvent

=1.2 gm We know that Molality

=mole of solute /mass of solvent in kg. Mole of benzene = 1.2/78;

Mass of solvent =1.2 gm =1.2/1000 kg Thus, Molality =(1.2/78)×(1000/1.2) =12.8 m Molality =(1.2/78)×(1000/1.2) =12.8 m.