hanikakaaaa
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Hi does anyone have any notes that are good bc im really scared for chem
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hanikakaaaa
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Thanks for the reply guys, but Ive already found some mad resources
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yeswhynot76
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hey how did it go?because i did it too.we can discuss if you want?
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funkypineapple
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(Original post by rimsha14)
hey how did it go?because i did it too.we can discuss if you want?

WHat do you think the grade boundaries going to be?
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morgannabanna
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How was the exam guys ?
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Stressed4ever
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It went pretty good for me! How about you guys? What did you get for the 4 mark energy question, I got something like 10400.
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hanikakaaaa
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yes it was easy for me
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hanikakaaaa
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(Original post by funkypineapple)
WHat do you think the grade boundaries going to be?
IDK maybe around 60 for an A i hope...
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ibrosy
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1-how many hcl moles for baca(co3)2
2-the enthol being less exothermic
{MCQ}
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yeswhynot76
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i put 3 moles but i am not sure
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yeswhynot76
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(Original post by funkypineapple)
WHat do you think the grade boundaries going to be?
i want them to be like 57 maybe
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yeswhynot76
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ask more questionss plzzzz
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T.mazhar
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do u guys think that the grade boundaries will be extremely high like those in jan and may 16? also, will it be wrong if someone wrote the molecular formula instead of structural in the flow chart of the reactions of propene
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T.mazhar
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what did you guys write for the question regarding pi bond and isomerism? also the one with the reason for insulation and the one why electrons are filled in empty orbitals first? what was the lattice energy value?
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hanikakaaaa
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(Original post by T.mazhar)
what did you guys write for the question regarding pi bond and isomerism? also the one with the reason for insulation and the one why electrons are filled in empty orbitals first? what was the lattice energy value?
Pibond Q: 2 differences:
-> Pi bond is weak sideways overlap of p orbitals, sigma bond is strong overlap of any oribtals
-> Pi bond only uses p orbitals, sigma bond can be any.

Isomerism:
-> The pi bond restricts roatation around the c=c double bond.

Insulation:
-> So all the energy produced by the reafction is transferred to water, and so the user will no burn their hands.

Electron/Orbitals:
-> The electrons repel each other
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hanikakaaaa
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(Original post by ibrosy)
1-how many hcl moles for baca(co3)2
2-the enthol being less exothermic
{MCQ}
I put 4 because this is the reaction i derived below:

BaCa(Co3)2 + HCl -> BaCaCl4 + 2H20 +2CO2

then i did calcs and found out 4 H needed and 4 CL needed...

so i put 4 as the answer
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ibrosy
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the question about why long chains are cracked to form petrol
and the last question did we have to draw the arrows for atomization
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ibrosy
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(Original post by hanikakaaaa)
Pibond Q: 2 differences:
-> Pi bond is weak sideways overlap of p orbitals, sigma bond is strong overlap of any oribtals
-> Pi bond only uses p orbitals, sigma bond can be any.

Isomerism:
-> The pi bond restricts roatation around the c=c double bond.

Insulation:
-> So all the energy produced by the reafction is transferred to water, and so the user will no burn their hands.

Electron/Orbitals:
-> The electrons repel each other
"-> Pi bond only uses p orbitals, sigma bond can be any.
"
i wrote instead that the electron density is distributed up an down the sigma
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T.mazhar
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what did u guys put for the other condition for fractional distillation? i just gave heating and no other temp. also, will they cut my marks if i didnt display ch3 in displayed formula and just wrote ch3? i mistakenly gave molecular formula in place of structural formula in the flow chart one. what do you guys think the GB might be? we're ****ed if its like jan and may 16 where they gave 96 for 68
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yeswhynot76
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(Original post by T.mazhar)
what did u guys put for the other condition for fractional distillation? i just gave heating and no other temp. also, will they cut my marks if i didnt display ch3 in displayed formula and just wrote ch3? i mistakenly gave molecular formula in place of structural formula in the flow chart one. what do you guys think the GB might be? we're ****ed if its like jan and may 16 where they gave 96 for 68
other condition was the 100KPa pressure or 1 atm. I really want the grade boundaries to be a little less than 60 or 60. Not more than this.
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