\(A+2HCl\rightarrow ACl_2+H_2\\ n_{HCl}=n_{Cl^-}=\dfrac{23,8-11,375}{35,5}=0,35\left(mol\right)\\ \Rightarrow n_A=\dfrac{0,35}{2}=0,175\left(mol\right)\\ \Rightarrow M_A=\dfrac{11,375}{0,175}=65\left(\dfrac{g}{mol}\right)\\ \Rightarrow A\left(II\right):K\text{ẽ}m\left(Zn=65\right)\)
\(A+2HCl\rightarrow ACl_2+H_2\\ Tacó:n_A=n_{ACl_2}\\ \Rightarrow\dfrac{11,375}{A}=\dfrac{23,8}{A+71}\\ \Rightarrow A=65\left(Zn\right)\)