\(2Al+3CuCl_2\rightarrow2AlCl_3+3Cu\\ n_{Al}=\dfrac{5,4}{27}=0,2\left(mol\right)\\ TheoPTHH:n_{AlCl_3}=n_{Al}=0,2\left(mol\right);n_{Cu}=\dfrac{3}{2}.n_{Al}=\dfrac{3}{2}.0,2=0,3\left(mol\right)\\ a,m_{Cu}=0,3.64=19,2\left(g\right)\\ b,m_{AlCl_3}=133,5.0,2=26,7\left(g\right)\)