Answer:
The molarity is greater than the Molality
Explanation:
Molality is the quantity of solute contained per Kg of solvent
While the molarity of the solution is the number of moles per dm^-3
Mass of solute = 40g
Volume of solvent = 500ml
Density of solvent = 1 g/ml
Hence 500ml = 500g
Molality = 40/0.5 = 80g/M/Kg
While the molarity 40/0.495 = 80.81/M/dm^3
80.81/M/dm^3 > 80g/M/Kg
The molarity is greater than the Molality