nAl=10/27(mol)
ta ccó pthh: 2Al+3S->Al2S3( nhiệt dộ cao)
theo ptth=> nAl2S3(lý thuyết)=1/2.nAl=\(\dfrac{1}{2}.\dfrac{10}{27}\)=\(\dfrac{5}{27}\)(mol)
=> mAl2S3(lý thuyết)=\(\dfrac{5}{27}.150=\dfrac{250}{9}\)(g)
=>H=\(\dfrac{mAL2S3\left(thucte\right)}{mAL2S3\left(lythuyet\right)}.100\%=\dfrac{25,5}{\dfrac{250}{9}}=91,8\%\)
\(n_{Al}=\dfrac{10}{27}\left(mol\right)\)
\(2Al+3S\underrightarrow{^{t^0}}Al_2S_3\)
\(\dfrac{10}{27}...........\dfrac{5}{27}\)
\(m_{Al_2S_3\left(lt\right)}=\dfrac{5}{27}\cdot150=\dfrac{250}{9}\left(g\right)\)
\(H\%=\dfrac{m_{tt}}{m_{lt}}\cdot100\%=\dfrac{25.5}{\dfrac{250}{9}}\cdot100\%=91.8\%\)