Practice question
Question
A 250 mL solution contains 9.75 g of HNO₃ and has a density of 1.03 g/mL. What is its molarity? (Molar mass: HNO₃ = 63 g/mol)
Explanation
Moles of HNO₃ = 9.75/63 ≈ 0.1548 mol. Volume = 0.25 L. Molarity = 0.1548/0.25 ≈ 0.619 M.
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