a, \(n_{H_2}=\frac{V}{22,4}=\frac{13,44}{22,4}=0,6\left(mol\right)\)
\(n_{HCl}=\frac{m}{M}=\frac{54,75}{36,5}=1,5\left(mol\right)\)
Ta thấy : \(n_{\left(H\right)}=2n_{H_2}=2.0,6=1,2\left(mol\right)\)
=> \(n_{HCl}=n_{\left(H\right)}=1,2\left(mol\right)\)
=> nHCl dư = \(1,5-1,2=0,3\left(mol\right)\)
\(Fe+2HCl\rightarrow FeCl_2+H_2\)
\(Zn+2HCl\rightarrow ZnCl_2+H_2\)
\(Mg+2HCl\rightarrow MgCl_2+H_2\)
Vậy sau phản ứng trong dung dịch thu được các chất :
\(H_2O,FeCl_2,MgCl_2,ZnCl_2,HCl\)
b, Ta thấy : \(m_M=m_{hh}+2m_{\left(Cl\right)}\)
=> \(m_M=32,2+2.35,5.n_{\left(Cl\right)}=32,2+71n_{HCl}\)
=> \(m_M=117,4\left(g\right)\)
Vậy ....