Chemistry Paper 4-theory- doubts =D

[PhyZac]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s12_qp_33.pdf
Q10 b ii knowitall10
xhizors
??

I did not do it!

 

[Ramsha007]

Please post it last time

plz anyone help me with the ratios of Nmr how do we calculate them like in low resoulution Nmr, ratios of areas under the peak or in mass spectroscopy ratios of peaks of Cl isotopes

 

[AlishaK]

which part?

[Fe(H2O)6-n(NO2)n]^2+ (n=1 to 6) how do we get this?

Q3 (D) why is that ketone getting reduced to -OH using Ni? ! M/J 2012 p41

 

[knowitall10]

Now xhizors ran away

 

[xhizors]

okay what do u mean by activated, i wasnt taught in tht terminology!? :S

hmm,
when some guys are attatched on 1st position like methyl -Oh they activate the 2nd position 4th position where they tend to push the incoming groups to those bootCamps

 

[knowitall10]

hmm,
when some guys are attatched on 1st position like methyl -Oh they activate the 2nd position 3 rd position where they tend to push the incoming groups to those bootCamps

FIT!!

 

[xhizors]

plz anyone help me with the ratios of Nmr how do we calculate them like in low resoulution Nmr, ratios of areas under the peak or in mass spectroscopy ratios of peaks of Cl isotopes

I posted it in other thread in a detail do check it thread name is like On demand only keypoints search if problem resist tell me!!

 

[AlishaK]

I did not do it!

Can u like tell me the second step? as in when it says, sin45=real p/ 2(1+2^1/2)=1/2^1/2 ?? :S

 

[xhizors]

[Fe(H2O)6-n(NO2)n]^2+ (n=1 to 6) how do we get this?

Q3 (D) why is that ketone getting reduced to -OH using Ni? ! M/J 2012 p41

for first part no idea maybe Oliveme can help!
for the other Question
look Reduction is gain of Hydrogen so u r just adding hydrogen with a presence of Nickel think Nickel as a catalyst(it is possibly increasing the surface Area for effective collisions)

 

[xhizors]

why ABS are rigids ??

 

[AlishaK]

hmm,
when some guys are attatched on 1st position like methyl -Oh they activate the 2nd position 3 rd position where they tend to push the incoming groups to those bootCamps

2nd 3rd or 2nd 4th 6th?
lol...Naice way thou!

 

[knowitall10]

why ABS are rigids ??

HUH? What are you saying?

 

[xhizors]

2nd 3rd or 2nd 4th 6th?
lol...Naice way thou!

oops sorry 2nd 4th and 6th(it can be same as 2nd depends where u start seeing it)

 

[Ramsha007]

I posted it in other thread in a detail do check it thread name is like On demand only keypoints search if problem resist tell me!!

Yeah i found the thread but i coudn't find anything related to ratios u know 1:3 ratio of heights of Cl isotopes or some 9:3:1 ratio they are given in chem guide how are we suppose to calculate them?

 

[xhizors]

HUH? What are you saying?

lol its an addition polymerisation example its also common in car systems too think think!!

 

[iKhaled]

Yeah i found the thread but i coudn't find anything related to ratios u know 1:3 ratio of heights of Cl isotopes or some 9:3:1 ratio they are given in chem guide how are we suppose to calculate them?

9:3:1 or 9:6:1 ?

 

[Ramsha007]

9:3:1 or 9:6:1 ?

yes yes that one!!!

 

[xhizors]

Yeah i found the thread but i coudn't find anything related to ratios u know 1:3 ratio of heights of Cl isotopes or some 9:3:1 ratio they are given in chem guide how are we suppose to calculate them?

look for chlorine u have to remember that Cl35 is in thrice time than cl37
similarly for Br 1:1 ka ratio

 

[AlishaK]

p

lol its an addition polymerisation example its also common in car systems too think think!!

prolly cause of strong forces b/w 'em...do u have it's structure or something?!

 

[AlishaK]

I did not do it!

I DONT GET THE SECOND STEP! :'(