State how many coulombs of charge must have been transferred

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In the reaction MnO4? + 8H+ + 5e? = Mn2+ + 4H2O, the manganese in 3.95 grams of KMnO4 (M.W. 158.0) were reduced to Mn2+. How many coulombs of charge must have been transferred to the permanganate ion? A) 1.60 x 104 C B) 2.41 x 103 C C) 1.20 x 104 C

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