配平下列化学方程式. (1)______HgO=______Hg+______O
问题:
配平下列化学方程式.
(1)______HgO=______Hg+______O2↑
(2)______C2H4+______O2=______CO2+______H2O
(3)______C2H5OH+______O2=______CO2+______H2O
(4)______CO+______Fe2O3=______Fe+______CO2
(5)______WO3+______H2=______W+______H2O.