mno4

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    How many moles of MnO4- were added?

    Hello, I have no idea how to solve this... The initial mass of an unknown sample containing iron (II) is 0.512 g. 12.6 mL of 0.01522 M KMnO4 is required to titrate the unknown to the endpoint. a) How many moles of MnO4- were added? b) How many moles of iron (II) must be present in the sample...