chemistry as help :(

[theunited]

hay any one please suggest me wht to do?
im very poor in chemistry and i've registered for chemistry as june session 2011
college is already over and xms are only 7 days to go
i've been busy revising other sub and then when i tried to solve past papers of chemistry i had nth in my mind...
im very worried pls pls help

 

[libra94]

ummm,, go through ur notes and ur book
do atleast from 07 till 2010 past papers :!:
and if u hav any questions or difficulty while solving the papers, ask us, we are here to help each other
btw good luck!!

 

[maybeitwasnoone]

Could someone please help me out in this paper,
November 2007 Paper 2 Q1 b and Q2 e ?

&&Thanks in advance

 

[msk]

1b i) bonding is between the electrons and the nucleous it is electrostatic...
ii) For H2 u need to show s-orbial over lapping and for HCL u need to show S and P overlap!

2e)i)there are two formulae AlCl3 and Al2Cl6 so at 460 it will be Al2Cl6 and at 1150 it will be AlCl3
ii)AlCl3 simple covalent bonding u have to show i.e dot and cross
iii) for Al2cl6 u need to show the dative bonding i.e lone pair will form a bond with Aluminium!

hope u get it!