(1)请将下列5种物质:N2O、FeSO4、Fe(NO3)3、HNO3和Fe2(SO4)3分别填入下面对应的横线上,组成一个未配平的化学方程式。

                                                                                                                              +                   +            +            +H2O

(2)反应物中发生氧化反应的物质是                                                                                    ,被还原的元素是                                                                                                                             

(3)反应中1 mol氧化剂                                                                                               (填“得到”或“失去”)                                                                                                                             mol电子。

(4)请将反应物的化学式及配平后的系数填入下列相应的位置中。

                                                                                                                                 

              +                                                                                                   

                                                                                                                     

 

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