Răspuns :
corespodent masa --- nr moli <=> kg <--> kmoli
120000 kg n kmoli
4FeS2 + 11O2 => 2Fe2O3 + 8SO2
4x120 8x64
=> n = 120000x8x64/4x120
= 128000 kmoli SO2
niu = nr moli = masa / miu(masa moleculara)
m = niuxmiu = 128000x64 = 8192000 kg SO2
64 kg SO2 ........................32 kg S
8192000 kg SO2 .............. a kg S
=> a = 4096000 kg S
verifica daca ai scris corect cerinteleproblemi.. sau datele..!!!