\(A+2HCl\rightarrow ACl_2+H_2\)
\(0.2.......0.4\)
\(M_A=\dfrac{13}{0.2}=65\left(\dfrac{g}{mol}\right)\)
\(A:Zn\)
PTHH: \(R+2HCl\rightarrow RCl_2+H_2\)
Ta có: \(n_R=\dfrac{1}{2}n_{HCl}=0,2\left(mol\right)\)
\(\Rightarrow M_R=\dfrac{13}{0,2}=65\) (Kẽm)