Ответ:
Mr(Al2O3)=27*2+16*3=54+48=102
Mr(H2SO4)=1*2+32+16*4=34+64=98
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Ответ:
Mr(Al2O3)=27*2+16*3=54+48=102
Mr(H2SO4)=1*2+32+16*4=34+64=98