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# Cambridge Chemistry Challenge watch

1. I can't fount Au answer! '
a little more precision, if you please!'
what can I do?
2. please PM me the answer to Ag I might be able to help u with Au level
3. Okay, for silver I know what symbol all the formulas are equal to... What the hell do I do with all these letters? I've tried everything.
4. (Original post by Bello08)
Okay, for silver I know what symbol all the formulas are equal to... What the hell do I do with all these letters? I've tried everything.
Wait, nevermind. Didn't realise Q was charge! Thought it was heat energy. Very annoying.
5. (Original post by Vinkal)
HOw do you convert the units for a and b help please
a needs to be divided by 10 to convert to units of m6 Pa mol-2
b needs the be divided by 1000 to convert from dm3 to m3
6. (Original post by mu142857)
a needs to be divided by 10 to convert to units of m6 Pa mol-2
b needs the be divided by 1000 to convert from dm3 to m3
thanks
7. (Original post by mu142857)
a needs to be divided by 10 to convert to units of m6 Pa mol-2
b needs the be divided by 1000 to convert from dm3 to m3
is the answer for Rg smaller than 9.2 because of the longer chain and are not branched?
8. (Original post by Vinkal)
is the answer for Rg smaller than 9.2 because of the longer chain and are not branched?
Yes
9. How manha decimais in Au?
10. (Original post by lpdsr)
How manha decimais in Au?

It accepts an integer value
11. just finished :P good set this month, particularly silver...finished 193rd overall , not too bad.
12. (Original post by Oromis263)
Clue time:

Entry
Straightforward. Best bet if you're not sure what to look for is to look up the number of protons in the nucleus of Pu and Ca...

Copper
Count the number of each particle. Search for that formula.
Bonus Clue
Black = Carbon, White = Hydrogen, Red = Oxygen, Blue = Nitrogen, Yellow = Sulphur

Silver
Standard C3L6 trickery. The clue is that it's a word puzzle. All you should need.

Gold
CHECK CONVERSIONS. Answer can be an integer. I found searching for the units in the a constant got me to the required equation. If all else fails, there is a useful calculator you can use online.

Rg
AS chemistry, what does more branches do for a hydrocarbon....
Bonus Clue
The number is an average of the 5 separate numbers for each molecule...
How do you mean, when you say silver is a word puzzle? Can you give me a hint at all please?
13. (Original post by gridda55)
How do you mean, when you say silver is a word puzzle? Can you give me a hint at all please?
There are seperate equations on the picture, figure out what the equations respresent
14. Need help with Rg. Hints, hints, hints?
15. (Original post by Letitfloat)
Need help with Rg. Hints, hints, hints?
Rg has something to do with fuels
The answer is number that relates to the performance of fuels in combustion engines
16. Octane ratings? Tried to search for them, cannot find them for some substances
17. Can the answer be negative? :|
18. (Original post by Letitfloat)
Can the answer be negative? :|
19. Just to say the only circumstance I have come across Rg is in polymer chemistry. Rg is the radius of gyration of the polymer which gives an indication of it's size.
20. Isn't the formula for Gold
Spoiler:
Show
(a^2n^2)/(bRTV^2)
All the units except Pa cancel out, yet I can't seem to get the right answer..

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