Ag không tác dụng dd \(H_2\left(SO_4\right)_3\)
-> Chất rắn không tan là Ag(4,6g)
\(n_{H_2}:\dfrac{6,72}{22,4}=0,3\left(mol\right)\)
\(2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\)
2...............3...................1....................3(mol)
0,2...........0,3.................0,1.................0,3(mol)
\(m_{Al}:0,2.27=5,4\left(g\right)\)
%\(m_{Al}:\dfrac{5,4}{5,4+4,6}.100\%=54\%\)
%\(m_{Ag}\):100%-54%=46%