\(a,CTTQ:A_2O_3\\ Ta.c\text{ó}:\dfrac{M_A.2}{M_O.3}=\dfrac{100\%-47,06\%}{47,06\%}\\ \Leftrightarrow94,12\%M_A=158,82\%.16\\ \Leftrightarrow M_A\approx27\left(\dfrac{g}{mol}\right)\\ \Rightarrow CTHH:Al_2O_3\\ b,4Al+3O_2\rightarrow\left(t^o\right)Al_2O_3\)
a,CTTQ:A2O3
Ta.có:MA.2MO.3=100%−47,06%47,06%⇔94,12%MA=158,82%.16⇔MA≈27(gmol)⇒CTHH:Al2O3b,4Al+3O2→(to)Al2O3 . Mình ko ghi đc dấu gạch