\(2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\)
a__________________________1,5a
\(Mg+H_2SO_4\rightarrow MgSO_4+H_2\)
b________________________b
Giải hệ PT:
\(\left\{{}\begin{matrix}27a+24b=7,8\\1,5a+b=\frac{8,96}{22,4}=0,4\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}a=0,2\\b=0,1\end{matrix}\right.\)ư
\(\Rightarrow m_{Al}=02.27=5,4\left(g\right)\)
\(\Rightarrow m_{Mg}=0,1.24=2,4\left(g\right)\)