An impure sample of oxalis acid was oxidized by potassium permanganate. A 0.261g sample of oxalis acid was dissolved and the solution was diluted to 100ml. A 25.0 ml portion of the oxalis acid solution was titrated with 26.2ml of 0.0107M potassium permanganate. How many moles of oxalis acid were titrated and what is the percent purity of the oxalis acid sample?

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