A student prepares a solution by dissolving 6.40 g of solid KOH in enough water to make 400.0 mL of solution. Calculate the molarity of K+ ions in this solution.   A 30.00 mL sample of this KOH solution is added to a 250 mL volumetric flask, and water is added to the mark. What is the new molarity of K+ ions in this solution?

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