Gọi a là mol Cl2, b là mol O2
\(m_{khi}=22,1-2,7-3,6=15,8\left(g\right)\)
\(\Rightarrow71a+32b=15,8\left(1\right)\)
\(n_{Al}=0,1\left(mol\right)\)
\(n_{Mg}=0,15\left(mol\right)\)
Bảo toàn e: \(2a+4b=0,1.2+0,15.2=0,6\left(2\right)\)
\(\left(1\right)+\left(2\right)\Rightarrow\left\{{}\begin{matrix}a=0,2\\b=0,05\end{matrix}\right.\)
\(\Rightarrow V2,4.\left(0,2+0,05\right)=5,6\left(l\right)\)