\(n_{H_2}=\dfrac{2,688}{22,4}=0,12\left(mol\right)\)
2Fe + 6HCl \(\rightarrow\) 2FeCl3 + 3H2
de: 0,08 \(\leftarrow\) 0,24 \(\leftarrow\) 0,12 (mol)
\(m_{Fe}=0,08.56=4,48g\)
\(m_{FeO}=9,6-4,48=5,12g\)
b, \(\%m_{Fe}=\dfrac{4,48}{9,6}.100\%\approx46,67\%\)
\(\%m_{FeO}\approx100-46,67\approx53,33\%\)
\(n_{FeO}=\dfrac{5,12}{72}\approx0,07\left(mol\right)\)
FeO + 2HCl \(\rightarrow\) FeCl2 + H2O
de: 0,07\(\rightarrow\) 0,14 (mol)
\(m_{HCl}=36,5.\left(0,14+0,24\right)=13,87g\)
c, \(m_{ddHCl}=\dfrac{m_{HCl}.100}{5}=277,4g\)
câu d đề bn viết mk k hiểu