Chem question

知識就是力量

2009-12-14 12:33 am

If 1 mole of oxygen O2 contains X atoms,
1 mole of ozone O3 will contain ...
Solution:
The no. of O atoms in O2
= X = 1 x 2 x L (L stands for Avogadros' constant)
So we have X = 2L , L = X/2
The no. of O atoms in O3
= 1 x 3 x L (L stands for Avogadros' constant)
= 3L
= 3(X/2)
= 3X/2

But how about the question change into:
1 mole of oxygen O2 contains X molecules,
1 mole of ozone O3 will contain ? molecules
How to solve?

更新1:

Same as my opinion^^

更新2:

http://hk.knowledge.yahoo.com/question/question?qid=7009121301175 Can you help me to answer them? I got those answer wrong.....

回答 (1)

老爺子

2009-12-14 12:44 am

✔ 最佳答案

No. of molecules in 1 mol of O2 = x molecules

Hence, no. of molecules in 1 mol of O3 = x molecules

Reason:
Each mole of molecular substances contain L molecules,
where L is Avogadro number (6.02 x 10^-23).
Now, x = L

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