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Author Topic: CHEM AND BIO HELP AND TIPS HERE  (Read 357314 times)

Offline High-R

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #2190 on: May 24, 2010, 11:40:11 pm »
heyy nidzz.....where do u live??..we have the same tym!!.. :P
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Offline NidZ- Hero

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #2191 on: May 24, 2010, 11:41:18 pm »
Quote from: hamz on May 24, 2010, 11:40:11 pm
heyy nidzz.....where do u live??..we have the same tym!!.. :P
i noe UAE where is u
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Offline High-R

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #2192 on: May 24, 2010, 11:42:31 pm »
me UAE too.... :D
yayyy!!...hi5!!
lol..we hav morning paper .....which skool?
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Offline High-R

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #2193 on: May 24, 2010, 11:43:54 pm »
hey ppl how do u obtain lime from limestone?
can anyone just give a quick explanation tht wud be really helpful!!....and wat reaction is it endo or exothermic?
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Offline Baladya

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #2194 on: May 24, 2010, 11:46:15 pm »
Quote from: hamz on May 24, 2010, 11:43:54 pm
hey ppl how do u obtain lime from limestone?
can anyone just give a quick explanation tht wud be really helpful!!....and wat reaction is it endo or exothermic?

CaCO3 ----> CaO + CO2
It is heated at high temperature. It is endothermic as energy is needed...
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Offline Vin

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #2195 on: May 24, 2010, 11:47:24 pm »
Quote from: hamz on May 24, 2010, 11:43:54 pm
hey ppl how do u obtain lime from limestone?
can anyone just give a quick explanation tht wud be really helpful!!....and wat reaction is it endo or exothermic?

CaCO3 ----> CaO + CO2
thermal decomposition (endo)

CaO + H2O --> Ca(OH)2
exo
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Offline Vin

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #2196 on: May 24, 2010, 11:48:00 pm »
Quote from: Nidzzz on May 24, 2010, 11:38:01 pm
hw jobless can u turn u actualli showed me ON DE MAP lolz :o :o ;D ;D ;D hey gud luck 4 chem n ya thanz 4 de helps :P:)

it takes 2 secs .. thanks to google ;)
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Offline Baladya

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #2197 on: May 24, 2010, 11:48:35 pm »
VIN go to sleep man >.<

k m off boobs :D GN ;)
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Offline High-R

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #2198 on: May 24, 2010, 11:48:52 pm »
kk..ya Thanks baladya..... ;)
and u did all pasrpapers?..and wat else did u do today for chem??..imean revised any special chapters..or anything do temme....Thanks...=D
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Offline Baladya

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #2199 on: May 24, 2010, 11:50:15 pm »
Quote from: hamz on May 24, 2010, 11:48:52 pm
kk..ya Thanks baladya..... ;)
and u did all pasrpapers?..and wat else did u do today for chem??..imean revised any special chapters..or anything do temme....Thanks...=D

I revised Chem from book very fast today. Only have 3 lessons i will do tommorow, and when i finish that, i will go over some questions i had doubt with b4 in past papers and i marked them :P
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Offline Vin

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #2200 on: May 24, 2010, 11:50:28 pm »
Quote from: Baladya on May 24, 2010, 11:48:35 pm
VIN go to sleep man >.<

k m off boobs :D GN ;)

yea u r there to handle so i dont need to worry ;)

LOL XD ..
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Offline High-R

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #2201 on: May 24, 2010, 11:52:29 pm »
ok cool!!....... :D..bst ov luck for exam!!
and ya ppl .....anyone..... u guys suggest any year tht was hard for chem p1.......plz temme so i can revise again!!
Thanks all..=D
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Offline NidZ- Hero

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #2202 on: May 24, 2010, 11:54:34 pm »
Quote from: hamz on May 24, 2010, 11:42:31 pm
me UAE too.... :D
yayyy!!...hi5!!
lol..we hav morning paper .....which skool?
westminister ahhh i thnk i noe u MAYBE u 4rm egypt rght ahh blahh

@vin stil wasted @MIN n noe i order u 2 go sleep man y torturin urself n noe it wuld be 5 dere rgth
i shuld be nt de de one sayin this i m awake de whole nght :P
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Offline High-R

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #2203 on: May 25, 2010, 12:02:24 am »
no not frm egypt...:P
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Offline NidZ- Hero

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #2204 on: May 25, 2010, 12:13:29 am »
can any1 explain this HAMZ u dere
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