\(n_{H_2}=\dfrac{11.2}{22.4}=0.5\left(mol\right),n_{O_2}=\dfrac{11.2}{22.4}=0.5\left(mol\right)\)
\(2H_2+O_2\underrightarrow{^{^{t^0}}}2H_2O\)
Lập tỉ lệ :
\(\dfrac{0.5}{2}< \dfrac{0.5}{1}\Rightarrow O_2dư\)
\(m_{H_2O}=0.5\cdot18=9\left(g\right)\)
pthh: 2H2+O2->2H2O
=>....2.........1......2.....(mol)
=>\(\dfrac{11,2}{22,4}\)........\(\dfrac{11,2}{22,4}\).....(mol)
\(=>\dfrac{0,5}{2}< \dfrac{0,5}{1}\)=>O2 dư , H2 phản ứng hết
\(=>nH2O=nH2=0,5mol=>mH2O=0,5.18=9g\)