Hello aspirant,

• Molarity (M) is defined as the number of moles of solute per liter of solution.
• Molarity depends on volume.

molarity = moles of solute/liters of solution

• Molality (m) is defined as the number of moles of solute per kilogram of solvent.
• Molality depends on mass.

molality = moles of solute/kilograms of solvent

Hope this helped.

Thank you.