air有咁多成份
點計到係29?
Molecular mass of air = 29?
2006-10-22 7:23 am
回答 (2)
2006-10-22 7:43 am
✔ 最佳答案
As air is mainly composed of 80% nitrogen and 20% oxygenthe molecular mass can be calculated as follow
giving the the relative atomic mass of N is 14 and O is 16
i.e. N2 = 14(2) = 28 and O2 = 16(2) = 32
28(0.8)+32(0.2)
= 22.4 + 6.4
= 28.8
參考: From myself^^
2006-10-22 8:11 am
It should be called as molar mass rather than molecular mass since air is not a compound.
收錄日期: 2021-04-12 21:51:27
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061021000051KK06249