What is the molar concentration (M) of a solution prepared by dissolving 20 g of NaOH in enough water to make 250 mL of solution?
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0.5 M
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1.0 M
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2.0 M
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5.0 M
📝 Detailed explanation
Moles of NaOH = 20g / 40g/mol = 0.5 mol. Volume = 0.250 L. Molarity = 0.5 / 0.250 = 2.0 M.
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