A 1.000-g sample of limestone gave a precipitate of Fe2O3 and Al2O3, weighing 0.0800 g. The precipitate of mixed oxides was fused with KHSO4, dissolved in sulfuric acid, and passed through a Jones reductor. The iron was titrated with 20.00 mL of 0.0100 N permanganate solution. Calculate the percentage of FeO and Al2O3 in the limestone (assume all iron present as FeO in the original sample)

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