Ответ:
W=n*Ar/Mr*100%
Mr(Al2O3)=27*2+16*3=102
W(Al)=2*27/102=0,53*100%=53%
W(O)=3*16/102=0,47*100%=47%
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Ответ:
W=n*Ar/Mr*100%
Mr(Al2O3)=27*2+16*3=102
W(Al)=2*27/102=0,53*100%=53%
W(O)=3*16/102=0,47*100%=47%