1. Chromium on one side of the plate (S = 10 cm2), dissolved in acid, oxidized to Cr(VI). The excess oxidizing agent was removed, and K2Cr2O7 was titrated coulometrically with Cu(I) ions electrogenerated from CuSO4. Calculate the mass of chromium covering 1 cm2 of the plate if the titration takes 6 min 35 s at a current of 35.4 mA.

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