Practice question
Question
A solution contains 8 g of a solute (molar mass = 80 g/mol) in 400 mL of solution. What is the molarity?
Explanation
Moles of solute = (8/80) = 0.1 mol . Volume = 400 mL = 0.4 L. Molarity = (0.1/0.4) = 0.25 M .
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