a) PTHH: \(Mg+2HCl\rightarrow MgCl_2+H_2\)
b)\(n_{Mg}=\frac{12}{24}=0,5\left(mol\right)\)
\(TheoPT:n_{HCl}=2n_{Mg}=1\left(mol\right)\)
\(\Rightarrow m_{HCl}=1.36,5=36,5\left(g\right)\)
\(TheoPT:n_{MgCl_2}=n_{Mg}=0,5\left(mol\right)\)
\(\Rightarrow m_{MgCl_2}=0,5.95=47,5\left(g\right)\)
c)\(TheoPT:n_{H_2}=n_{Mg}=0,5\left(mol\right)\)
\(\Rightarrow V_{H_2}=0,5.22,4=11,2\left(l\right)\)