\(BTNT\left(H\right):n_{H_2SO_4}.2=n_{H_2}.2\\ \Rightarrow n_{H_2SO_4}=0,08\left(mol\right)\\ Tacó:n_{SO_4^{2-}}=n_{H_2SO_4}=0,08\left(mol\right)\\ \Rightarrow m_{muối}=m_{KL}+m_{SO_4^{2-}}=3,56+0,08.96=11,24\left(g\right)\)
QToxh:Al→Al3++3eQTkhử:2N+5+8e→N+12BTe:nAl.3=nN2O.8⇒nAl=2,4(mol)