Author Topic: Chemistry Help HERE ONLY !!  (Read 106010 times)

Offline MaNa

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Re: Chemistry Help HERE ONLY !!
« Reply #60 on: May 25, 2009, 02:08:18 pm »
In liquid molecules are free to move about between clusters but confined within the vessel they are contianed in due to the attractive force between theem
In Gas molecules are high speed independent motion in random manner there is Niegligable force of attraction
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Offline afarooq

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Re: Chemistry Help HERE ONLY !!
« Reply #61 on: May 25, 2009, 02:18:34 pm »
cheeerrsss  :)

Offline MaNa

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Re: Chemistry Help HERE ONLY !!
« Reply #62 on: May 25, 2009, 02:19:45 pm »
oie dont forget + rep :)
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Offline xiao

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Re: Chemistry Help HERE ONLY !!
« Reply #63 on: May 25, 2009, 03:40:25 pm »
Gases have particles all disordered meanwhile solids are orderes and liquid has low ordered and hihg disordered particles. this is wat i found in books :D

Offline Naruto

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Chemistry 2009!!! Paper 3 prep.....
« Reply #64 on: May 25, 2009, 05:53:07 pm »
hello guyz i have started this topic because i have some confusion in some topics!!
Like i am not sure whether to study the basic more or experiments or organic chemistry for paper 3. Which of them is more important... hope you will help me!!! :)
thanx..

Monica

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Re: Chemistry 2009!!! Paper 3 prep.....
« Reply #65 on: May 25, 2009, 06:03:16 pm »
For paper 3 unfortunately u have to study everything i guess!! :)

Offline Naruto

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Re: Chemistry 2009!!! Paper 3 prep.....
« Reply #66 on: May 25, 2009, 06:09:07 pm »
ahan true!! but i meant that which one is more improtant to study first for revision.

Monica

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Re: Chemistry 2009!!! Paper 3 prep.....
« Reply #67 on: May 25, 2009, 06:12:54 pm »
ahan true!! but i meant that which one is more improtant to study first for revision.

ok i guess:

1)Organic chemistry
2)Metals
3)Electrolysis
4)Rust prevention
5)Sulphur, Air, Water, Carbohydrates


I think.... all will come...but Metals is an important topic...

Offline godfather93

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Re: Chemistry 2009!!! Paper 3 prep.....
« Reply #68 on: May 25, 2009, 06:20:39 pm »
a question on quantitative chemistry always comes.

Offline Shogun

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Re: Chemistry 2009!!! Paper 3 prep.....
« Reply #69 on: May 25, 2009, 06:25:17 pm »
1)organic chemistry(all equations and thier rquirements eg catalyst,temp etc and thier properties and uses)
2)metals
3)sulphur and nitrogen (all equations and thier requirements and what are the properties of reversible equations and uses)
4)everythin about reactivity series and thier properties and reactions (even electrloysis)
5)polymerisations (their types and uses and how terlene and nylons are made and what are thier uses)
6)properties and understanding and drwaing of ionic,covalent and metallic bondings
7)properties od groups in periodic table
8)basic stuffs about solid liquids and gases and thier properties
9) how to do calculations in chemistry

it mostly about everythin but i think this is more convenient to start with.
and do practise past papers

all revision of these things take about maximum 3 days
one who masters both the pen and paper is indeed a true warrior.

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Offline Ghost Of Highbury

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Re: Chemistry 2009!!! Paper 3 prep.....
« Reply #70 on: May 25, 2009, 06:27:03 pm »
hey shogun chk out d "a request" thread..
i have explained abt the binomial theorm in math..!!
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Offline Shogun

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Re: Chemistry 2009!!! Paper 3 prep.....
« Reply #71 on: May 25, 2009, 06:27:35 pm »
alright
one who masters both the pen and paper is indeed a true warrior.

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Offline Pythagoras

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Re: Chemistry 2009!!! Paper 3 prep.....
« Reply #72 on: May 25, 2009, 06:51:33 pm »
The syllabus is really helpful. It clearly indicates what to study. The syllabus is guiding my studies!  :D

Offline Bani

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Re: Chemistry Help HERE ONLY !!
« Reply #73 on: May 25, 2009, 08:30:33 pm »
I need help in chemistry  oct/nov 08 second varient paper
Q 7ai)
i actually got this question for my mocks

here's the working
volume of oxygen left
according to question             according to equation
1 mol                                         6.5 mol
if 20cm3                                           x??
so 20 x 6.5 = 130cm3

150-130 = 20cm3

so volume of oxygen left = 20cm3

volume of carbondioxide formed

1                       4
20                     x??
so 20 x 4 = 80

volume of carbondioxide formed = 80cm3
Thankyou but wont we use the formulaa???
n umm why did u subtracted it form 150?

no there is no need to use a formulae

n oxygen is in excess n we want to find the volume of oxygen left at the end of experiment
so 150-130= 20

Hey, correct me someone if Im wrong. For part i) don't we simply write down the volume of the reagent which is not in access? So, there is no need to subtract or is there?

Offline godfather93

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Re: Chemistry Help HERE ONLY !!
« Reply #74 on: May 25, 2009, 08:43:56 pm »
can someone please tell me the concept of oxidation states and how is it worked out?