配平和完成下列化学方程式: (1) P+FeOP2O5+Fe (2) Fe(红热)+  H2O(气)——Fe3

配平和完成下列化学方程式:

(1) P+FeOP2O5+Fe

(2) Fe(红热)+  H2O()——Fe3O4+H2

(3)  N2+H2——NH3

(4)  Al+Fe3O4——Fe+Al2O3

答案

思路解析:根据化学方程式配平的步骤,结合质量守恒定律,反应前后原子总数不变,配平。

答案12P+5FeOP2O5+5Fe

23Fe(红热)+4H2O(g) Fe3O4+4H2

3N2+3H2====2NH3

42Al+Fe2O32Fe+Al2O3

相关题目

What has your uncle bought ___ you? Will you please show it ___ me? A. to, for 
What has your uncle bought ___ you? Will you please show it ___ me? A. to, for   B. for, to    C. to, to     D. for, for
Nancy enjoyed herself so much ________ she visited her friends in Sydney last ye
Nancy enjoyed herself so much ________ she visited her friends in Sydney last year. A.that         B.since           C.when          D.where
已知集合, 且, 则的取值范围是                    
已知集合, 且, 则的取值范围是                                                  (    )   A.{z∈R |27≤z≤36}      B.{z∈N |27
The plane ________ when I arrived  at the airport.  A.have gone
The plane ________ when I arrived  at the airport.  A.have gone     B.went      C.had gone   D.is going
女娄菜的叶形有披针形和狭披针形之分,已知其披针叶雌株
女娄菜的叶形有披针形和狭披针形之分,已知其披针叶雌株与狭披针叶雄株杂交,子一代全为披针叶,子一代中的披针叶植株之间杂交,所得子二代雌
过直线上的一点作圆的两条切线,当直线关于对称时,它们之
过直线上的一点作圆的两条切线,当直线关于对称时,它们之间的夹角为(       ) A.30°        B.45°         C.60°           D.90°
You may think the days of childhood would rank as most people’s happiest. But
You may think the days of childhood would rank as most people’s happiest. But, in fact, men are happiest at 40 while women are most satisfied at 38 when they are fit and healthy and have good fri
在用样本频率估计总体分布的过程中,下列说法正确的是( 
在用样本频率估计总体分布的过程中,下列说法正确的是(    )A.样本容量越大,估计越精确                B.样本容量越小,估计越精确C.总

最新题目