\(m_{FeS_2}=125.\left(1-4\%\right)=120\left(g\right)\)
\(n_{FeS_2}=\frac{m_{FeS_2}}{M_{FeS_2}}=\frac{120}{120}=1\left(mol\right)\)
\(PTHH:4FeS_2+11O_2\underrightarrow{t^o}2Fe_2O_3+8SO_2\)
\(Theo\) \(PTHH,\) \(ta có:\)
\(n_{SO_2}=\frac{8}{4}n_{FeS_2}=2n_{FeS_2}=2.1=2\left(mol\right)\)
\(V_{SO_2}=n_{SO_2}.22,4=2.22,4=44,8\left(l\right)\)