-- I’ve lived here three years. How about you? --- I have lived here six years ago. A. since; for B. for; for C. for; since D. since; since 答案:C有一铁的氧化物样品,用5mol·L-1盐酸140
mL恰好完全溶液,所得溶液还能吸收标况下0.56L氯气,亚铁离子全部变成Fe3+,则该氧化物可能的化学式为( )
A.Fe2O3 B.Fe3O4 C.Fe4O6 D.Fe5O7