氧化亚铁粉末和铝粉配成铝热剂,分成两等份。一份在高温下恰好完

氧化亚铁粉末和铝粉配成铝热剂,分成两等份。一份在高温下恰好完全反应后,在与盐酸反应;另一份直接放入足量的烧碱溶液中充分反应。前后两种情况下生成的气体的质量比是                                                          

A1:1            B.2:3            C.  3:2             D 28:9

答案

A

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