How to convert from mol % to wt %?

How to convert from mol % to wt %?

Сообщение spadekevin » Пт июн 29, 2018 12:30 am

Hi,

So the concentration of molecule A is 0.5% mol. The rest of the molecules are water.
This is calculated by (number of molecules of A / total number of molecules) x 100
More specifically, this is [20 / (20 + 3980)] x 100
We are given that the molecular weight of A is 136 g/mol. I have no idea how to use this to convert into wt%.
Would it be perhaps that I have to assume that I must also add that water is 18 g/mol in the equation?
I still don’t know how to go form here though?

Please help.

I didn't find the right solution from the Internet.

References:-
http://www.chemicalforums.com/index.php?topic=95901.0
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Thanks!
spadekevin
 
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