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Edexcel IAL Chemistry Unit 1 (WCH01 )/ May 27 June 2016

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Original post by Sandy_Vega30
ppm - 8x10^-3g

No. of atoms in an element - there were 5 atoms, so 3.0x10^24.

It was 3x10^23
How?


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I said the main points I think but I rambled I don't think my handwriting or quality of writing was not too good 🙈 Do u think I will loose marks for quality ??
Original post by Sandy_Vega30


It was to the power of 24😂 I think
Original post by Sandy_Vega30


The atoms were 5 first find moles then multipy it by 5 and then avagadro comstant
Well, ****. I'm screwed.
(edited 7 years ago)
Original post by Sandy_Vega30
Well, ****. I'm screwed.


What did u do in it ? U multiplied moles by avagadro only ?
Original post by MrBioBombastic
What did u do in it ? U multiplied moles by avagadro only ?


Forgot to multiply by moles. :frown:


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Original post by Sandy_Vega30
ppm - 8x10^-3g

No. of atoms in an element - there were 5 atoms, so 3.0x10^24.

no of atoms : i solved it as
6*10^23 *0.1 mole *5
i donot know about ur answer please explain
am I the only one thinks that the time to finish the exam was on time ?/
Original post by MrBioBombastic
What assumption u made ? I wrote Carbon has Ar of 12 in mass spectrometry question


My assumption was that C has Ar 12.0000.....
Original post by chemistryAYS
what did everyone get in the multiple choice for the amount of moles of water in every hydrated mole of the substance


I got 6
Btw I also wrote D for the reforming MCQ. but with all these opinions I'm not even sure which is supposed to be the correct answer.
Original post by OnTheHorizon
Btw I also wrote D for the reforming MCQ. but with all these opinions I'm not even sure which is supposed to be the correct answer.

what was the question saying and what is mcq ?
Original post by Esmeralda T
My assumption was that C has Ar 12.0000.....

i wrote that the relative atomic mass for carbon is 12 is it correct
Original post by katenell
i wrote that the relative atomic mass for carbon is 12 is it correct

Yes i wrote the same
Original post by Sandy_Vega30
Forgot to multiply by moles. :frown:

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Happens ..
Original post by MrBioBombastic
Happens ..


lol wo main is ki baat kr rha tha xD shoka hone wali
Original post by MrBioBombastic
Yes i wrote the same


What are you referring to? mcq? or about the definition for isotopes?
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EUSHA
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Original post by Sandy_Vega30
I got 6.


how did you do that?

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