A 0.411 g sample of potassium hydrogen phthalate, KHC8H4O4 (molar mass = 204.22g/mol), is dissolved with 50.0 mL of deionized water in a 125mL Erlenmeyer flask. The sample is titrated to the phenolphthalein endpoint with 15.17 mL of a sodium hydroxide solution. What is the molar concentration of the NaOH solution? Express the molar concentration of NaOH to the correct number of significant figures.

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