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（1）1mol不同固体物质的体积各不相同，其原因是：①______，在同温同压时任何气体间一定几乎相同的是②______． （2）在下列反应方程式中标明电子转移的方向和数目（单线桥）（该反应中H 2 O 2 只发生如下变化过程：H 2 O 2 →O 2 ）③______ 2H 2 CrO 4 +3H 2 O 2 =2Cr（OH） 3 +3O 2 ↑+2H 2 O 此反应中若生成标准状况下氧气6.72L，则转移电子的物质的量为④______ （3）在物质分类中硫酸氢钠除属于钠盐、可溶性盐、硫酸氢盐外还可划分为⑤______盐． （4）一定条件下NaHSO 4 与Ba（OH） 2 反应的离子反应可写为： H + +SO 4 2- +Ba 2+ +OH - =BaSO 4 ↓+H 2 O，则所得溶液呈⑥______性（酸性或碱性），若要所得溶液呈中性则继续反应的离子方程式为⑦______ （5）氧化还原反应是由氧化反应和还原反应组成的对立统一体如： 3Cu+8HNO 3 =3Cu（NO） 3 +2NO↑+4H 2 O 氧化：3Cu-6e - =3Cu 2+ ；还原：2NO 3 - +6e - +8H + =2NO↑+4H 2 O试写出铝投入氢氧化钠溶液中发生反应的离子方程式⑧______，可拆分成氧化和还原过程：氧化：2Al-6e - +8OH - =2AlO 2 - +4H 2 O，试写出 还原：⑨______．
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