Qualification > Sciences
ALL CIE CHEMISTRY DOUBTS HERE !!
cs:
--- Quote from: Ari Ben Canaan on November 16, 2010, 09:45:05 am ---@CS
For the Second question :
Imagine there is 1 mole of N2O4 hence there must be 2 moles of NO2
Therefore the partial pressures of each gas are 1/3 (N2O4) and 2/3 for NO2
inputting these into the initial equation at the top gives 4/3
--- End quote ---
What about the 50% thing?
cs:
--- Quote from: Ari Ben Canaan on November 16, 2010, 09:32:38 am ---@CS
For the 1st question :
500/24000 = 0.020833333333 moles of oxygen.
Using avogadro's constant : 0.020833333333 divided by 1/(6.02*1023)
gives an answer of 1.25 *10^22
--- End quote ---
ohh so we don't need to use Pv= nRT?
Deadly_king:
--- Quote from: $!$RatJumper$!$ on November 16, 2010, 11:13:38 am ---For Q39 why do we reject the last one? Doesnt it also have 6 carbon atoms?
--- End quote ---
Oops........sorry I forgot to precise.
The third one indeed contains 6 carbon atoms. But if you break it to form two radicals, you'll find that you'll be getting two compounds one with 4 carbon atoms and the other with only two carbon atoms.
This cannot be since propane contains 3 carbon atoms. So both radicals should contain 3 carbon atoms as well. ;)
Deadly_king:
--- Quote from: cs on November 16, 2010, 11:43:45 am ---What about the 50% thing?
--- End quote ---
The 50% indicates that the equilibrium is at dynamic equilibrium. ;)
Since 50% of reactant becomes products while the other 50% remains as reactants. ;D
$!$RatJumper$!$:
--- Quote from: Deadly_king on November 16, 2010, 11:50:48 am ---Oops........sorry I forgot to precise.
The third one indeed contains 6 carbon atoms. But if you break it to form two radicals, you'll find that you'll be getting two compounds one with 4 carbon atoms and the other with only two carbon atoms.
This cannot be since propane contains 3 carbon atoms. So both radicals should contain 3 carbon atoms as well. ;)
--- End quote ---
Thankx makes sense now :)
Gosh how do you people remember such small details while doing questions... wish i was as smart :/
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version