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Cambridge Chemistry Challenge

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Original post by Acruzen
yeah this is where I am



rock salt is more soluble than normal salt but i cant find a number


its called halite
Oh man, finally finished silver. Turns out the G really does mean "giga". Oh and, something else to note, the BOE they want is the bigger one. On to gold....
Reply 1462
Avatar for Lutski
Lutski
Original post by Randophera
Oh man, finally finished silver. Turns out the G really does mean "giga". Oh and, something else to note, the BOE they want is the bigger one. On to gold....


Could you send me the answer? I've given up, though I know exactly what to do.
Reply 1463
Avatar for aarya
aarya
Please someone can help with the gold level its killing me.
hey guys i cant balance the Rg question ive added HCl and the catalyst neither work any clues /the answer
Original post by Gotzz
Okay thanks :smile:


Still can't figure out the answer to this.

Could you give me a few tips please?
How do I do the gold level question? :s-smilie:
Original post by EvilRaptorMudkip
holy smokes entry was confusing!


How did you do the entry question?
I am still confused by it?
Original post by aarya
Please someone can help with the gold level its killing me.


Have you done the gold level?
Reply 1469
Avatar for aarya
aarya
No pls can someone pls help with the answer or a hint about it.
They could've had a larger range for silver. Turns out I was about 0.1% off for the whole time.
Reply 1471
Avatar for Blayney
Blayney
Original post by PythianLegume
They could've had a larger range for silver. Turns out I was about 0.1% off for the whole time.


Really the range is that small?? o.O ouch thats tough...
Original post by Blayney
Really the range is that small?? o.O ouch thats tough...


Have you finished? I know the reaction for Rg, but can't get the smiles format :frown:

Edit: Found it, was not using ring closure numbers properly.
(edited 11 years ago)
What sort of a range should I be looking for in Silver?
Original post by House MD
What sort of a range should I be looking for in Silver?


>1000
Reply 1475
Avatar for mu142857
mu142857
Could someone please point me in the right direction for silver.
I've found that 1.9859 cal K−1 mol−1= 8.3144621 J K−1 mol−1
Then I divided that by 0.33 to get 25.195339697 J ºN−1 mol−1
Then I multiplied it by 109 to get 2195339696.97 J ºN−1Gmol−1
Then I divided it by 453.59237lb to get 55546215.8611039 J ºN−1Glbmol−1
Then I divided it by 6117863200J to get 0.00907934911998422 BOE ºN−1Glbmol−1
I don't understand how to get it to over 1000. I've tried shifting the decimal point but it doesn't work. Could someone please tell me where I'm making a mistake?
(edited 11 years ago)
Original post by mu142857
Could someone please point me in the right direction for silver.
I've found that 1.9859 cal K−1 mol−1= 8.3144621 J K−1 mol−1
Then I divided that by 0.33 to get 25.195339697 J ºN−1 mol−1Then I multiplied it by 109 to get 2195339696.97 J ºN−1Gmol−1
Then I divided it by 453.59237lb to get 55546215.8611039 J ºN−1Glbmol−1
Then I divided it by 6117863200J to get 0.00907934911998422 BOE ºN−1Glbmol−1
I don't understand how to get it to over 1000. I've tried shifting the decimal point but it doesn't work. Could someone please tell me where I'm making a mistake?


It is mol-1, not mol, in the units.
Reply 1477
Avatar for mu142857
mu142857
Original post by karimjbacchus
You don't divide by 453, you times by 453*10^9


Thank you very much!
Original post by xboxaddict
Can't even do the entry question, I'm so confused right now :frown: any help please?


Try to look at the background picture and what has happened recently there.
finished...found them all so irritating

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