Răspunsuri

2014-03-12T20:24:40+02:00
H2S+O2=SO2+H2O
NH3+O2=NO+H2O
SO2+O2=SO3
4FeS2+11O2=2Fe2O3+8SO2
PH3+O2=P2O3+H2O
2 3 2