S+O2=SO22SO2+O2=2SO3SO3+H2O=H2SO4SO2+H20=H2SO3S+H2=H2SCaSO4·2H2O石膏NaSO42·10H2O芒硝FeS2黄铁矿As4S4雄黄As2S3雌黄HgS辰砂（朱砂）2Na+S=Na2SFe+S=FeS（条件加热）2Cu+S=Cu2S(加热）Hg+S=HgSS+2H2SO4(浓）=3S...