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A student has 100.0 mL of an unknown solution of Vitamin C. She removes 1.00 mL of this solution, dilutes it to 50.0 mL, and titrates this second solution with an iodine solution that is 8.5 × 10-4 M. 6.60 mL of iodine solution is required to reach the endpoint.

1. How many moles of iodine were added to the vitamin C solution to reach the endpoint of this titration?

2. If at the endpoint, the moles of vitamin C and the moles of iodine are equal, how many milligrams of Vitamin C were in the original 100.0 mL?

3. What is the molarity of the original unknown vitamin C solution (prior to dilution)?

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