A mixture of hydrogen and oxygen (more than sufficient to react with all the hydrogen present) occupied 240 cm^3. After explosion, the volume of the residual gas was 30 cm^3. What was the volume of hydrogen in the initial mixture? (All volumes were measured at room condition.)
THX :)
F.5 Chemistry (Volume)
2014-06-05 12:44 am
回答 (1)
2014-06-05 3:51 am
✔ 最佳答案
LetV cm³ be the initial volume of H2 in themixture.2H2 + O2 → H2O
Volume of H2 reacted = V cm³
Volume of O2 reacted = (1/2)V cm³
Volume of O2 unreacted = 30 cm³
Total initial volume of the mixture :
V + (1/2)V + 30 = 240
1.5V = 210
V = 140
Initial volume of H2 in the initial mixture = 140 cm³
參考: 土扁
收錄日期: 2021-04-15 15:42:56
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20140604000051KK00055