包头专版2018年中考化学复习练习第四章生命之源_水4.4化学方程式201901141140.doc

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14.4 化学方程式1下列化学方程式书写和配平没有错误或遗漏的是( )A2H 2O2=2H2OO 2B2AlO 3=Al2O3CSO 2 SO2= = = = =点 燃 D2KMnO 4 K2MnO4MnO 2O 2= = = = = 2配平下列化学方程式:(1)PO 2P2O5_。(2)P2O5H 2OH3PO4_。(3)CCO 2高温,)CO_。(4)CH3OHO 2点燃,)CO 2H 2O_。3火箭推进器中装有液态肼(N 2H4)和过氧化氢(H 2O2),当它们混合反应时,放出大量的热量,有关反应方程式为N2H42H 2O2=X24H 2O,据此判断 X2的化学式是_。2参考答案1D2(1)4P5O 2 2P2O5= = = = =点 燃 (2)P2O53H 2O=2H3PO4(3)CCO 2 2CO= = = = =高 温 (4)2CH3OH3O 2 2CO24H 2O= = = = =点 燃 3N 2

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