Question

3gm of salt of molecular weight30 is dissolved in 250gm of water . the molality of the solution is?

Answer 1

Well, `"molality"="moles of solute"/"kilograms of solvent..."`

Explanation:

And so here ...............

`"molality"-=((3.0*g)/(30.0*g*mol^-1))/(250*gxx10^-3*kg*g^-1)=0.40*mol*kg^-1`.