You have performed an iodometric titration to determine the vitamin C concentration of 25.00 mL of an unknown solution. 33.45 mL of a 2.030 x 10-3 M solution of KIO3 were needed to reach the endpoint. The Erlenmeyer flask containing the vitamin C sample also contained an excess of hydrochloric acid and potassium iodide (KI). Remembering the stoichiometry of KIO3 to vitamin C, what is the vitamin C concentration of the unknown?
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