As follows:
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Chem question
2010-07-28 4:28 am
回答 (1)
2010-07-28 6:03 am
✔ 最佳答案
a) hydrogen: as rocket fueloxygen: breathing
b) no. the oxygen atoms and hydrogen atoms are not chemically combined.
c) water
d) yes. The proportion of oxygen atoms and hydrogen atoms are fixed, and the oxygen and hydrogen atoms are chemically combined.
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100727000051KK01572