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Practice question

MCQ

Question

A 0.5 M solution of K₂SO₄ (molar mass = 174 g/mol) has a density of 1.15 g/mL. What is the mass of the solute in 300 mL of this solution?

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Explanation

Moles = 0.5 × 0.3 = 0.15 mol . Mass of K₂SO₄ = 0.15 × 174 = 26.1 g . (Density is extra info, not needed for molarity-based calculation.)

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