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svyt847288

Ответ:m(Me) : m(O)= Mэ(Me) : Mэ(O)


0,9 : 0,8 = M(Me) : 8


Mэ(Me)=9г/моль;


M(Me)=9*3=27г/моль;


 


       Al2O3+2KOH(t) =2KAlO2+H2O


Ответ: алюминий.

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