3. What is the volume of 1.0 N. (feqv \u003d 1/6) a solution of potassium dichromate (K2Cr2O7) must be added to
1300 ml of K2Cr2O7 solution with iron titer Т(K2Cr2O7 /Fe) equal to 0.0045 g/ml to obtain a solution with Т(K2Cr2O7 /Fe) = 0.0050 g/ml?
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