What is the mass percentage of a solution prepared by dissolving 40 g of salt in 160 g of water?
Total mass = 40 + 160 = 200 g . Mass % = (40/200) × 100 = 20% .
Ref: NCERT Class 12 Chemistry > Chapter 1: Solutions > Topic: Solubility - of Solids and Gases in Liquids Henry's Law