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A 12.9 mL sample of HNO3 was diluted to a volume of 104.11 mL. Then, 25...

A 12.9 mL sample of HNO3 was diluted to a volume of 104.11 mL. Then, 25 mL of that diluted solution were needed to neutralize 46.2 mL of 0.50 M KOH. What was the concentration of the original nitric acid?

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