Quặng Pirit (FeS2)---------> SO2
Bảo toàn nguyên tố S: \(n_{FeS_2}.2=n_{SO_2}.1=\dfrac{50000}{22,4}=\dfrac{15625}{7}\Rightarrow n_{FeS_2}=\dfrac{15625}{14}\)(mol)
Vì H=95% => \(n_{FeS_2}=\dfrac{15625}{14}.\dfrac{100}{95}=1174,81\left(mol\right)\)
=> \(m_{FeS_2}=1174,81.120=140977,2\left(kg\right)\)
Vì quặng pirit chứa 98% FeS2
=> \(m_{quặng}=140977,2.\dfrac{100}{98}=143854,3\left(kg\right)\approx143,85\left(tấn\right)\)