老師話hydrogen gas 係H2
點解好多MOLECULE都冇寫H2
如HCl (hydrochloric ACID)
equation: Cu 加 O2 ------ CuO
oxygen吾係O2咩,點解同Copper結合之後就冇左個2
係咪兩個OXYGEN 既原子分散左?
收錄日期: 2021-04-25 21:28:25
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090507000051KK01057