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Cambridge Chemistry Challenge

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Reply 1620
Avatar for lpdsr
lpdsr
I can't fount Au answer! '
a little more precision, if you please!'
what can I do?
Reply 1621
Avatar for aarya
aarya
please PM me the answer to Ag I might be able to help u with Au level
Reply 1622
Avatar for Bello08
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.
Reply 1623
Avatar for Bello08
Bello08
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.
Reply 1624
Avatar for mu142857
mu142857
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
Reply 1625
Avatar for Vinkal
Vinkal
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
:smile:
Reply 1626
Avatar for Vinkal
Vinkal
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?
Reply 1627
Avatar for jbc123
jbc123
Original post by Vinkal
is the answer for Rg smaller than 9.2 because of the longer chain and are not branched?

Yes
Reply 1628
Avatar for lpdsr
lpdsr
How manha decimais in Au?
Reply 1629
Avatar for jbc123
jbc123
Original post by lpdsr
How manha decimais in Au?



It accepts an integer value
Reply 1630
Avatar for ltigers
ltigers
just finished :P good set this month, particularly silver...finished 193rd overall , not too bad.
Reply 1631
Avatar for gridda55
gridda55
Original post by Oromis263
Clue time:

Entry



Copper



Silver



Gold



Rg



How do you mean, when you say silver is a word puzzle? Can you give me a hint at all please?
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 :smile:
Need help with Rg. Hints, hints, hints?
Reply 1634
Avatar for mu142857
mu142857
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
Octane ratings? Tried to search for them, cannot find them for some substances :frown:
Can the answer be negative? :|
Reply 1637
Avatar for ltigers
ltigers
Original post by Letitfloat
Can the answer be negative? :|


Yes, the answer is negative
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.
Isn't the formula for Gold

Spoiler

All the units except Pa cancel out, yet I can't seem to get the right answer..

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