Giúp mình giải câu 28 với
View attachment 134652
[tex]hh+HCl\rightarrow H_{2}+\left\{\begin{matrix} MgCl_{2}\\ AlCl_{3} \end{matrix}\right.+NH_{3}\rightarrow \left\{\begin{matrix} Al(OH)_{3}\\ Mg(OH)_{2} \end{matrix}\right.\rightarrow \left\{\begin{matrix} Al_{2}O_{3}\\ MgO \end{matrix}\right.[/tex]
[tex]n_{H_{2}}[/tex] =0,1[tex]\Rightarrow n_{Mg}=0,1\Rightarrow n_{Al_{2}O_{3}}=0,1[/tex]
[tex]m_{rắn}= m_{Al_{2}O_{3}}+m_{MgO}[/tex]