Question

Molecular mass of a salt is 30. And if 3 gram of salt is dissolved in 250 gram of water then Its malality (m) will be --l​

Answer 1

Answer:

3 g of a salt of molecular weight 30 is dissolved in 250 g of water. The expression for the molarity of the solution is

Molality(m)=molar mass of /saltmass of salt​×1/mass of water​

Substituting values in the above expression, we get

m=3/30​×1/250​×1000=0.4

The molality of the solution is 0.4.

Explanation: