Practice question
Question
How many grams of NaCl (molar mass = 58.5 g/mol) are required to prepare 400 mL of a 0.25 M solution?
Explanation
Moles of NaCl = 0.25 × 0.4 = 0.1 mol . Mass = 0.1 × 58.5 = 5.85 g .
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