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Author Topic: chemistry CIE past ppr doubt  (Read 3176 times)

Offline Saladin

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Re: chemistry CIE past ppr doubt
« Reply #15 on: January 09, 2010, 06:49:30 am »
No problem, it was my pleasure and gain.
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Offline sweetie

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Re: chemistry CIE past ppr doubt
« Reply #16 on: January 14, 2010, 03:22:41 pm »
hey,,,
i really need ur help guys in que.2.c.i of Nov02 paper2

Thank You in advance :-*
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Offline Saladin

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Re: chemistry CIE past ppr doubt
« Reply #17 on: January 14, 2010, 03:26:40 pm »
Will look now.
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Offline Saladin

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Re: chemistry CIE past ppr doubt
« Reply #18 on: January 14, 2010, 03:49:49 pm »
Working on it.
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Offline sweetie

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Re: chemistry CIE past ppr doubt
« Reply #19 on: January 14, 2010, 04:07:37 pm »
okay......
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Offline Saladin

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Re: chemistry CIE past ppr doubt
« Reply #20 on: January 14, 2010, 04:08:19 pm »
Here u go
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Offline Saladin

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Re: chemistry CIE past ppr doubt
« Reply #21 on: January 14, 2010, 04:08:46 pm »
Please tell me if u fully understand.
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Offline sweetie

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Re: chemistry CIE past ppr doubt
« Reply #22 on: January 14, 2010, 04:14:24 pm »
ya i got it... :)
Thank You  ;)
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Offline sweetie

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Re: chemistry CIE past ppr doubt
« Reply #23 on: January 14, 2010, 04:22:10 pm »
wait am stuck....
where did u get da 0.06 moles from????????????
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Offline Saladin

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Re: chemistry CIE past ppr doubt
« Reply #24 on: January 15, 2010, 08:56:09 am »
it is explained in the ethanol table!
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Offline sweetie

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Re: chemistry CIE past ppr doubt
« Reply #25 on: January 15, 2010, 03:47:03 pm »
ok.... i guess i got it
thanx 4 da help  :)
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Offline Saladin

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Re: chemistry CIE past ppr doubt
« Reply #26 on: January 15, 2010, 04:48:57 pm »
Just doing my job.
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Offline sweetie

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Re: chemistry CIE past ppr doubt
« Reply #27 on: January 28, 2010, 04:04:02 pm »
hey dude,

could u help me with this?
may07 ,Q9,16,18 -p1
nov02, Q1 - p1
« Last Edit: January 28, 2010, 04:51:45 pm by notty_me »
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Offline vanibharutham

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Re: chemistry CIE past ppr doubt
« Reply #28 on: January 30, 2010, 04:25:27 am »
November 2002,
Q1 P1

1 A mixture of 10 cm3 of methane and 10 cm3 of ethane was sparked with an excess of oxygen.
After cooling to room temperature, the residual gas was passed through aqueous potassium
hydroxide.
What volume of gas was absorbed by the alkali?
A 15 cm3
B 20 cm3
C 30 cm3
D 40 cm3

The equation for the reaction is:

CH4(g) + C2H6(g) 5.5 O2(g) ? 3CO2(g) + 5H2O (l)

Avogadro's law states that Equal volumes of ideal or perfect gases, at the same temperature and pressure, contain the same number of particles, or molecules

Therefore,

10cm³ of Methane
10cm³ of Ethane

and 30cm³ of Carbon Dioxide
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Offline sweetie

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Re: chemistry CIE past ppr doubt
« Reply #29 on: February 18, 2010, 05:37:15 pm »
thanx  :D
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