\(a,PTHH:Fe_2O_3+3H_2\rightarrow2Fe+3H_2O\\ b,Bảo.toàn.KL:m_{Fe_2O_3}+m_{H_2}=m_{Fe}+m_{H_2O}\\ c,m_{H_2}=m_{Fe}+m_{H_2O}-m_{Fe_2O_3}=11,2+5,4-16=0,6\left(g\right)\)
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