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OCR Chemistry F322~ 4th June 2013~ AS Chemistry

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What the **** was the biodegradable propellant?

Original post by walkers38

I was thinking of that but then it has + in between boxes. So I just put H2O in the other box :mad:

:mad:

thats wrong because the oh is removed and it forms a double bond which can go on to two different carbons thats why there were two boxes

Original post by Dizzie31

yeah it was only one mark , i'm pretty sure that'd be just fine

My diagram extended the whole page. Such a long molecule.

For the octagon i did the dispayed formula of the cyclic octane. Is that ok

Original post by dawg

1130g/the mr = 210

(210/220)*100 = 95.45

It was 11.13 kg and you times it by a thousand to get 11130g

Original post by daisyrchds

yeah

:smile:

So why was the last bit worth 3 marks? You didn't have to divide by 1000 again did you?

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Kvothe the Arcane

Original post by Saif95

Looks like Im the only one who found it hard/ messed it up :frown:

:frown:

I din't think it was easy and also messed up a few times :biggrin:

:biggrin:

.

Original post by Farringtonn

For the branched ten chain alkene would it be ok if I did two beaches I did 2,3-dimethyloctane?

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I think so, I put that.

Original post by Dizzie31

There was 2 moles already in the original equation, not 1.
10/2 = 5
so you times it by 5.

please be wrong lol :frown:

:frown:

Original post by walkers38

My diagram extended the whole page. Such a long molecule.

LOl i drew mine small purposely :smile:

:smile:

Original post by Saif95

Looks like Im the only one who found it hard/ messed it up :frown:

:frown:

dont be silly! out of the thousands of people who took this exam, you only know how a few class mates feel or people on the tsr. chin up :smile:

:smile:

Was the formation positive or negative !??

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I added the enthalpy change to the activation energy, surely both those would be added? hmm.

username1107833

Original post by massi1296

theres different ways to get it but im sure it was 1640

I would bet you my house that its 820 ahahah

Legal drugdealer

whats the general verdict?

Original post by irfymahmood

thats wrong because the oh is removed and it forms a double bond which can go on to two different carbons thats why there were two boxes

I shouldn't have ignored what the question said 'draw the organic products'. Hmph.

I put s8 and then also S4+ for the question below

Also infrared spec question when it said about its real world application I put Breathilisers to check alchohol levels?

Original post by jacksonmeg

seems like nobody knows what a 9 c chain is :biggrin:

:biggrin:

its nonane

for the sulfur question, did you have to put S8+ and S4+ ?

Original post by WillGC

For the octagon i did the dispayed formula of the cyclic octane. Is that ok

If it just asked for the structure then you should be fine :smile:

:smile:

Original post by theCreator

I would bet you my house that its 820 ahahah

aha i'm going with this guy! i'd bet my life

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