1)a) Fe+S=to=>FeS
\(n_S=\frac{16}{32}=0,5mol;n_{Fe}=\frac{28}{56}=0,5mol\)
Dựa theo PTHH=> Hai chất đều hết.
\(n_{FeS}=n_{Fe}=0,5mol\Rightarrow m_{FeS}=0,5.88=44g\)
b) Fe+S=to=>FeS
\(n_S=\frac{8}{32}=0,25mol;n_{Fe}=\frac{28}{56}=0,5mol\)
Vì: \(\frac{0,25}{1}< \frac{0,5}{1}\Rightarrow\)S hết, Fe dư
-\(n_{FeS}=n_S=0,25mol\)
\(m_{FeS}=0,25.88=22g\)
\(n_{Fe\left(dư\right)}=0,5-\left(\frac{0,25.1}{1}\right)=0,25mol\)
\(m_{Fe\left(dư\right)}=0,25.56=14g\)