\(n_{H_2}=\dfrac{2,9748}{24,79}=0,12(mol)\\ 2AL+6HCl\to 2AlCl_3+3H_2\\ \Rightarrow n_{Al}=n_{AlCl_3}=0,08(mol);n_{HCl}=0,24(mol)\\ a,m_{Al}=0,08.2=2,16(g)\\ m_{HCl}=0,24.36,5=8,76(g)\\ b,m_{AlCl_3}=0,08.133,5=10,68(g)\\ c,2H_2+O_2\xrightarrow{t^o}2H_2O\\ \Rightarrow n_{H_2O}=0,12(mol)\\ \Rightarrow m_{H_2O}=0,12.18=2,16(g)\)