M,S=32Kg/kmol; M,SO2= 64kg/kmol; M,SO3= 80kg/kmol;M,H2SO4=98kg/kmol
32kg...........64kg
S +O2-->SO2
x..................64kg................................x=
64kg........................80kg
SO2+1/2O2----->SO3
x..................................80kg.......................x=
80kg........................98kg
SO3 +H2O----> H2SO4
x................................98kg......................x=
completeaza valorile x,,,,,,,,,,,,,,,,,,,e floare la ureche !!!!