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（10分）甲、乙、丙三位同学分别用如下三套实验装置及化学药品（其中碱石灰为固体氢氧化钠和生石灰的混合物）制取氨气。请你参与探究，并回答下列问题： （1）三位同学制取氨气的化学方程式为：_______________________ （2）三位同学向下排空气法收集氨气，而不用排水法，其原因是_________ A、氨气难溶于水 B、氨气极易溶于水 C、氨气密度比空气大 D、氨气密度比空气小 E、氨气密度比 F、氨气密度比 （3）三位同学用上述装置制取氨气时,其中没有收集到氨气，收集不到氨气的主要原因是____________________ (用化学方程式表示)。 （4）检验氨气是否收集满的方法是_________ A、闻到有氨气逸出 B、棉花被气体冲出 C、用湿润的红色石蕊试纸在试管口检验，发现试纸变蓝 D、用湿润的蓝色石蕊试纸在试管口检验，发现试纸变红 （5）三位同学都认为他们的实验装置也可用于加热碳酸氢铵固体制取纯净的氨气，你判断能够达到实验目的的是___________(填“甲”、“乙”或“丙”)。
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【简答题】Are you happy? Do you remember a time when you were happy? Are you seeking happiness today? Many have sought a variety of sources for their feelings of happiness．Some have put their heart and efforts ...
【简答题】阅读理解 Are you happy? Do you remember a time when you were happy? Are you seeking happiness today? Many have sought a variety of sources for their feelings of happiness. Some have put their hearts and e...
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A.
兼容并包的社会风气
B.
封闭的社会环境
C.
野蛮落后的社会习俗
D.
繁荣的对外交往
【简答题】阅读理解 Are you happy? Do you remember a time when you were happy? Are you seeking happiness today? Many have sought a variety of sources for their feeling of happiness.Some have put their heart and effo...
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A.
3年，一万元以上三万元以下
B.
5年，一万元以上三万元以下
C.
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D.
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