\(\begin{array} {l} a)\\ Fe+2HCl\to FeCl_2+H_2\\ n_{Fe}=\dfrac{11,2}{56}=0,2(mol)\\ n_{FeCl_2}=n_{Fe}=0,2(mol)\\ m_{FeCl_2}=0,2.127=25,4(g)\\ b)\\ n_{H_2}=n_{Fe}=0,2(mol)\\ V_{H_2}=0,2.22,4=4,48(l)\\ c)\\ n_{O_2}=\dfrac{4,48}{22,4}=0,2(mol)\\ 2H_2+O_2\xrightarrow{t^o}2H_2O\\ \dfrac{n_{H_2}}{2}<n_{O_2}\to O_2\text{ dư}\\ n_{H_2O}=n_{H_2}=0,2(mol)\\ m_{H_2O}=0,2.18=3,6(g) \end{array}\)
a: \(Fe+2HCl\rightarrow FeCl_2+H_2\)
\(n_{Fe}=\dfrac{11.2}{56}=0.2\left(mol\right)\)
nên \(n_{FeCl_2}=0,2\left(mol\right)\)
\(m_{FeCl_2}=0.2\cdot127=25,4\left(g\right)\)
b: \(V_{H_2}=0.2\cdot22.4=4.48\left(lít\right)\)