摘要:27.(1)HCl,H2S,CH4 (2)CH4(g)+2O2(g) ====CO2(g)+2H2O(l),△H=-890KJ.mol-1 (3)2PH3+4O2====P2O5+3H2O MnO2①2H2O2==== 2H2O+ O2↑ ②氧化剂 ③1:2
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