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You have 2000. g of aqueous NaOH solution. The percent by mass of the solute is 4.25%. How many grams of NaOH are in the solution?

If you have 100.0 mL of a 25.0% aqueous solution of ethanol, what volumes of ethanol and water are in the solution?

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4.25% NaOH by mass means 4.25 g NaOH/100 g solution. In 2000 g of the solution we will have
4.25 x (2000/100) =

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