Determina el estado de oxidacion del manganeso en el ion de pppppppppppppppppppppppppppppppppeeeeeeeeeeeeeeeeeeeeeeeerrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmanganatoooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo MnO4-