Bài 46 :
Theo đề bài ta có : \(\left\{{}\begin{matrix}nH2=\dfrac{3,36}{22,4}=0,15\left(mol\right)\\nFe2O3=\dfrac{16}{160}=0,1\left(mol\right)\end{matrix}\right.\)
Ta có PTHH 1 :
\(Fe2O3+3H2-^{t0}\rightarrow2Fe+3H2O\)
0,1mol..........................0,2mol
Ta có PTHH 2 :
\(Fe+H2SO4\rightarrow FeSO4+H2\uparrow\)
: Theo PTHH 2 ta có :
\(nFe=\dfrac{0,2}{1}mol>nH2=\dfrac{0,15}{1}mol\) => nFe(dư) , nH2 ( thiếu)
=> H = \(\dfrac{n\left(ch\text{ất}-thi\text{ếu}\right)}{n\left(ch\text{ất}-d\text{ư}\right)}.100\%=\dfrac{0,15}{0,2}.100\%=75\%\)