Author Topic: Edexcel CHEMISTRY DOUBTS!!!!  (Read 253637 times)

Offline Deadly_king

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #495 on: November 19, 2010, 05:03:41 pm »
Okay wait ..... which last two did u refer to the one u talked about or the images I posted  :-[ :-\

You meant this
http://www.chemguide.co.uk/organicprops/alkenes/dioleqn2.gif

and this
http://www.chemguide.co.uk/organicprops/alkenes/dioleqn4.gif

right??

Offline The Golden Girl =D

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #496 on: November 20, 2010, 05:39:20 am »
Yes .
Verily, in the remembrance of Allah do hearts find rest(13:28)

Please, Don't forget to Include GG in your Prayers =D

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #497 on: November 20, 2010, 02:02:10 pm »
I don't get how to calculate the ppm ?  ...it's just ain't getting into my head -.-

Can someone help ,Please ?
Verily, in the remembrance of Allah do hearts find rest(13:28)

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Offline Deadly_king

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #498 on: November 21, 2010, 02:23:36 pm »
I don't get how to calculate the ppm ?  ...it's just ain't getting into my head -.-

Can someone help ,Please ?

Now am not getting you :-[

Can you elaborate a bit? What do you mean by ppm?

Alpha

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #499 on: November 21, 2010, 02:28:45 pm »
Now am not getting you :-[

Can you elaborate a bit? What do you mean by ppm?

She has been banned from posting, on request. But you can communicate via PMs.  :)

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #500 on: November 21, 2010, 02:44:52 pm »
Ok, she's been unbanned.

Offline guMnam

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #501 on: November 21, 2010, 03:50:17 pm »
ahem... why does graphite conduct electricity in only one direction while other metals can conduct electricity in all directions ??


i need the ans fast.....have to complete ma worksheet :P

I <3 Challenges
Never give up :)

Offline Deadly_king

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #502 on: November 22, 2010, 07:33:11 am »
She has been banned from posting, on request. But you can communicate via PMs.  :)

Ok, she's been unbanned.

It's alright. I got her pm ;)

Offline Deadly_king

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #503 on: November 22, 2010, 07:48:03 am »
ahem... why does graphite conduct electricity in only one direction while other metals can conduct electricity in all directions ??


i need the ans fast.....have to complete ma worksheet :P

In graphite, each carbon atom uses only 3 of its 4 outer energy level electrons in covalently bonding to three other carbon atoms in a plane. Each carbon atom contributes one electron to a delocalised system of electrons that is also a part of the chemical bonding. The decolcalised electrons are free to move throughout the plane.

For this reason, graphite conducts electricity along the planes of carbon atoms, but does not conduct in a direction at right angles to the plane.

Hope it's clear ;)

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #504 on: November 24, 2010, 03:38:08 pm »
I got a several Question in Chemistry Unit 1 *I'm attaching a Paper (June 2009 Unit 1)

I really need it  :-X :-\

it's Qs :22]b) , 23]d)i) , 24]b)ii)

Thanks In Advance
Verily, in the remembrance of Allah do hearts find rest(13:28)

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #505 on: November 24, 2010, 03:44:25 pm »
I got a several Question in Chemistry Unit 1 *I'm attaching a Paper (June 2009 Unit 1)

I really need it  :-X :-\

it's Qs :22]b) , 23]d)i) , 24]b)ii)

Thanks In Advance

Anyone ?  :'(
Verily, in the remembrance of Allah do hearts find rest(13:28)

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #506 on: November 24, 2010, 04:19:42 pm »

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #507 on: November 24, 2010, 05:12:03 pm »
Check your inbox.

Lia Sorry but I got two more  :-[ :-X

Q 18]b)ii)...19]c)

Thx :)
Verily, in the remembrance of Allah do hearts find rest(13:28)

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Offline Amii

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #508 on: November 24, 2010, 05:20:06 pm »

By my sweeett nephew ;D

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #509 on: November 24, 2010, 05:40:42 pm »
Lia Sorry but I got two more  :-[ :-X

Q 18]b)ii)...19]c)

Thx :)

Anyone ?  ???
Verily, in the remembrance of Allah do hearts find rest(13:28)

Please, Don't forget to Include GG in your Prayers =D