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Author Topic: Chemistry p1(NIGHTMARE) Coming  (Read 10313 times)

Offline lys90

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Re: Chemistry p1(NIGHTMARE) Coming
« Reply #15 on: June 09, 2009, 01:11:05 pm »
Quote from: manuroqs on June 09, 2009, 12:33:53 pm
Can sumbody help me with a question,it's Q10,chemistry ppr1,may/june 06

let's take the no of mol of N2O4= x

given N2O4 is 50% dissociated, so the change of partial pressure of the gas is -0.50x, and 2mol of NO2 is +1.0x

so 0.50x + 1.0x = 1atm
                   x = 2/3

so Kp = (2/3)^2 divide by (0.5 x 2/3)
        = 4/3 atm

 :)
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Offline kimlasmay

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Re: Chemistry p1(NIGHTMARE) Coming
« Reply #16 on: June 09, 2009, 01:58:26 pm »
I think the percentile might save us all since the paper was extremely hard...But,pls dont skip the paper...Just do it...We may never know how its gona be...
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Offline Ke Dandan

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Re: Chemistry p1(NIGHTMARE) Coming
« Reply #17 on: June 09, 2009, 02:11:26 pm »
Organic Sucks
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Offline manuroqs

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Re: Chemistry p1(NIGHTMARE) Coming
« Reply #18 on: June 09, 2009, 02:12:19 pm »
Quote from: lys90 on June 09, 2009, 01:11:05 pm
Quote from: manuroqs on June 09, 2009, 12:33:53 pm
Can sumbody help me with a question,it's Q10,chemistry ppr1,may/june 06

let's take the no of mol of N2O4= x

given N2O4 is 50% dissociated, so the change of partial pressure of the gas is -0.50x, and 2mol of NO2 is +1.0x

so 0.50x + 1.0x = 1atm
                   x = 2/3

so Kp = (2/3)^2 divide by (0.5 x 2/3)
        = 4/3 atm

 :)


thanx dude!  :)
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Offline WARRIOR

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Re: Chemistry p1(NIGHTMARE) Coming
« Reply #19 on: June 09, 2009, 03:20:06 pm »
help needed Q4 october novermer 2006
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Offline EMPEROR

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Re: Chemistry p1(NIGHTMARE) Coming
« Reply #20 on: June 09, 2009, 06:20:24 pm »
Quote from: Kimo Jesus on June 09, 2009, 03:20:06 pm
help needed Q4 october novermer 2006

What i did is trace the line back to the y-axis.... hence it should be 70 cm3 of oxygen only , because at 0 x-axis there is no hydrocarbon only oxygen... the graph which traces back to 70 should be correct thus the answer is D... im not sure of my method, but thats what i could come up to... hope it helped ;)
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Offline EMPEROR

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Re: Chemistry p1(NIGHTMARE) Coming
« Reply #21 on: June 09, 2009, 06:23:36 pm »
I have a question myself, Question 20 OCT/NOV 2003... THEY WANTED THE ISOMERS OF C4H10O
 i got butane1 ol
then butan2-ol
then methyl propan1 ol
then methypropan 2ol
another is C-C-C-O-C
another ether could be C-C-O-C-C

thats 6 not 5.... so HELP :-[...
thanks
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Offline seesan9293

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Re: Chemistry p1(NIGHTMARE) Coming
« Reply #22 on: June 09, 2009, 06:32:31 pm »
stop it guys!!! many of us are sick off chemm!!!
i have nt studied a word today....soo im just gonna do "inky...pinky..ponki.."..
 kinda hate chem......................guys has anyone given de art exam??
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Offline me@me@me

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Re: Chemistry p1(NIGHTMARE) Coming
« Reply #23 on: June 09, 2009, 07:21:32 pm »
what is the best way to do the last 10 questions???
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Offline hira

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Re: Chemistry p1(NIGHTMARE) Coming
« Reply #24 on: June 09, 2009, 07:26:54 pm »
anyone sure of the last 10 questions please post here
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Offline pixie

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Re: Chemistry p1(NIGHTMARE) Coming
« Reply #25 on: June 09, 2009, 08:48:06 pm »
lat ten questions
see if number one is correct. if not then the answer is C

if one is right then check 3 then two
if three is correct, it will have to be A
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Offline Ro1024

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Re: Chemistry p1(NIGHTMARE) Coming
« Reply #26 on: June 09, 2009, 08:57:57 pm »
A - 1,2,3

B - 1,2

C - 2,3

D - 1
 ::)
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Offline Edward10

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Re: Chemistry p1(NIGHTMARE) Coming
« Reply #27 on: June 10, 2009, 01:15:45 am »
Can any 1 tell me sme kind of imp hint..............
hve 1and a half hr 2 go...............
im sh*t SCARED !
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Offline hira

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Re: Chemistry p1(NIGHTMARE) Coming
« Reply #28 on: June 10, 2009, 01:40:36 am »
yes edward please memrioise the last 10 answers...only last!
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Offline hell_devil

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Re: Chemistry p1(NIGHTMARE) Coming
« Reply #29 on: June 10, 2009, 01:54:23 am »
have anyone attended chemistry p1? if then could u tell me the questons u attende today????
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