Question

A solution has 28 gram oxalic acid in 275 ml. solution. And its density is 1.29g/ml
Calculate molality of the solution.
Or
46 gram of NaOH dissolved in 104gram of water if density of the solution is 1.48g/ml
calculate molarity of the solution.​

Answer 1

Molarity=moles of solute/volume of solution in litre

molality =moles of solute/mass of solvent in kg