Date: 1/02/2013 16:49:35
From: Angus Prune
ID: 258784
Subject: Cambridge Chemistry Challenge!
A series of cryptic chemistry puzzles, new ones each month. Rather tricky….
http://www.c3l6.com/
A series of cryptic chemistry puzzles, new ones each month. Rather tricky….
http://www.c3l6.com/
Actually, less cryptic than previous years. I’ve already solved the first two (with reference to texts).
Angus Prune said:
Actually, less cryptic than previous years. I’ve already solved the first two (with reference to texts).
Well…the first question is rather simple.
poikilotherm said:
Angus Prune said:
Actually, less cryptic than previous years. I’ve already solved the first two (with reference to texts).
Well…the first question is rather simple.
well now I’m fnerked. Damn Organic chem.
poikilotherm said:
poikilotherm said:
Angus Prune said:
Actually, less cryptic than previous years. I’ve already solved the first two (with reference to texts).
Well…the first question is rather simple.
well now I’m fnerked. Damn Organic chem.
Is that the “who is the reaction named after?” one?
Angus Prune said:
poikilotherm said:
poikilotherm said:Well…the first question is rather simple.
well now I’m fnerked. Damn Organic chem.
Is that the “who is the reaction named after?” one?
yea.
poikilotherm said:
Well…the first question is rather simple.
Speak for yourself…
Witty Rejoinder said:
poikilotherm said:Well…the first question is rather simple.
Speak for yourself…
:) Chen brane.
Chem….def not English…
FIGJAM!
Up to gold level question.
Any further than gold AP?
Hmmm. Got the first one right. But the registration and login doesn’t seem to want to work.
poikilotherm said:
FIGJAM!Up to gold level question.
morrie said:
poikilotherm said:
FIGJAM!Up to gold level question.
Yeah, I got the gold one, but the next one has me stuffed.
Cool…
It’s 1g of Al right? and 0.1M NaOH?
poikilotherm said:
morrie said:
poikilotherm said:
FIGJAM!Up to gold level question.
Yeah, I got the gold one, but the next one has me stuffed.Cool…
It’s 1g of Al right? and 0.1M NaOH?
I’m still stuck at silver
:/
Angus Prune said:
I’m still stuck at silver:/
Ivan nazarov
poikilotherm said:
Angus Prune said:
I’m still stuck at silver:/
Ivan nazarov
Ahhhh. Well the next one looks easy enough, I just have to do the maths.
Angus Prune said:
poikilotherm said:
Angus Prune said:
I’m still stuck at silver:/
Ivan nazarov
Ahhhh. Well the next one looks easy enough, I just have to do the maths.
Could you post the working…I keep screwing it up. I think I’m messing the units up.
poikilotherm said:
Angus Prune said:
poikilotherm said:Ivan nazarov
Ahhhh. Well the next one looks easy enough, I just have to do the maths.
Could you post the working…I keep screwing it up. I think I’m messing the units up.
Well I thought it would be easy…
It is japanese yen, isn’t it? a 1g aluminium coin?
Angus Prune said:
poikilotherm said:
Angus Prune said:Ahhhh. Well the next one looks easy enough, I just have to do the maths.
Could you post the working…I keep screwing it up. I think I’m messing the units up.
Well I thought it would be easy…
It is japanese yen, isn’t it? a 1g aluminium coin?
Oh, it was easy, I was just typo-ing the atomic mass of aluminium.
1 yen coin is 1g of Al, atomic mass 27. 1g/(27g/mol) = 0.0370mol
NaOH at pH13 = 0.1mol/L
2Al + 2NaOH + 2H2O => 2NaAlO2 + 3H2O
OH:Al = 1:1
therefore, need 0.0370mol of NaOH.
0.0370mol/(0.1mol/L) = 0.370L or 370mL.
The next one seems to be about hexagonal packing and unit cells. I had a crack at it, but got it wrong.
morrie said:
The next one seems to be about hexagonal packing and unit cells. I had a crack at it, but got it wrong.
I think I’ll try to start from the beginning
morrie said:
The next one seems to be about hexagonal packing and unit cells. I had a crack at it, but got it wrong.
It looks like a snowflake. It seems to have the dimensions in mm so I was trying to work out volume, density, mass, thence moles and molecules….but got it wrong.