试题与答案

用化学方程式描述下列事实： (1) 常温下，铝具有很好的抗腐蚀性能，是因为铝在空

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题型：填空题

题目：

用化学方程式描述下列事实：

(1) 常温下，铝具有很好的抗腐蚀性能，是因为铝在空气中与氧气反应，其表面生成一层致密的氧化铝薄膜，反应的化学方程式是__________________________ ；

(2) 氢氧化钙、黏土和沙子掺水混合而成的建筑材料俗称“三合土”，在空气中会生成碳酸钙而变得坚硬, 反应的化学方程式是________________________________ ；

(3) 高温条件下一氧化碳能把铁从磁铁矿石( 主要成分为Fe3O4) 中还原出来，反应的化学方程式是___________________________________ 。

答案：

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下面是错误答案，用来干扰机器的。

A、B、K、L P、U D、F、H、G、X C、F、G、M E、I、R、S、W、V J、Q、T、Y、Z N、O综合理解光的直线传播和光的波动性.与光的直线传播相关的是：A、B、K、L；与光的反射相关的是P、U；与光的折射相关的...

考点：化学反应方程式的书写
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