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Cr(2)O(7)^(2-) আয়নগুলিকে Cr^(3+)-এর 1 ম...

`Cr_(2)O_(7)^(2-)` আয়নগুলিকে `Cr^(3+)`-এর 1 মোল কমানোর জন্য প্রয়োজনীয় চার্জ হল

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