Practice question
Question
What is the mass percentage of KNO₃ in a solution made by dissolving 10.1 g of KNO₃ in 39.9 g of water? (Molar mass: KNO₃ = 101 g/mol)
Explanation
Total mass = 10.1 + 39.9 = 50 g. Mass % = (10.1/50) × 100 = 20.2%.
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