Giải:
PTHH: H2 + FeO -to-> H2O + Fe (x=1;y=1)
Ta có:
\(n_{H_2}=\frac{8,96}{22,4}=0,4\left(mol\right)\\ n_{H_2O}=\frac{7,2}{18}=0,4\left(mol\right)\\ n_{Fe}=\frac{28,4}{56}\approx0,507\left(mol\right)\)
=>\(m_{H_2}=0,4.2=0,8\left(g\right)\)
\(m_{H_2O}=0,4.18=7,2\left(g\right)\)
\(m_{Fe}=0,507.56=28,392\left(g\right)\)
Theo định luật bảo toàn khối lượng, ta có:
\(m_{H_2}+m_{FeO}=m_{H_2O}+m_{Fe}\\ < =>0,8+m=7,2+28,392\\ < =>m=\left(7,2+28,392\right)-0,8=34,792\left(g\right)\)
FexOy+yH2->yH2O+xFe
msp=7,2+28,4=35,6g
\(n_{H_2}=\frac{8,96}{22,4}=0,4mol\)
\(m_{H_2}=0,4.2=0,8g\)
ADĐLBTKL: \(m_{Fe_xO_y}=35,6-0,8=34,8g\)