The Student Room Group

Scroll to see replies

Original post by kelvinbeyioku
100 usually


its out of 150 so definitely not 100ums, 95 would score somewhere in the region of 140.
Reply 1781
Original post by needtosucceed=)
its out of 150 so definitely not 100ums, 95 would score somewhere in the region of 140.


i think he/she meant full ums. :redface:
Original post by Tejmasta
Doing q2 ii of june 11 paper

I said heat under reflux as the reaction conditions, but mark scheme says:

distil --> Guidance: Reflux CONs distil mark

what does the CON mean?


wrong paper?
Original post by needtosucceed=)
its out of 150 so definitely not 100ums, 95 would score somewhere in the region of 140.

https://www.whatdotheyknow.com/reque...ogy_a?unfold=1
i think you mean marks ?


nope I meant what I said. the other guy said 95marks = 100 ums, i was saying that the paper ums total is 150, so 95marks would be around 140ums. although having seen that link its probably full ums.
(edited 10 years ago)
Reply 1785
Original post by Namod
your english is killing me


sorry but this section is not about english

*right
Reply 1786
Original post by needtosucceed=)
nope I meant what I said. the other guy said 95marks = 100 ums, i was saying that the paper ums total is 150, so 95marks would be around 140ums


exactly so 95 raw marks could never be 100 UMS because that would mean each mark afterwards would count for 10ums
Could anyone just summarise on how to tackle the infrared and mass spec long answer questions? :smile:


Posted from TSR Mobile
Original post by tanja55
exactly so 95 raw marks could never be 100 UMS because that would mean each mark afterwards would count for 10ums

look the link https://www.whatdotheyknow.com/reque...ogy_a?unfold=1
for that year 150 ums was 94 marks
could someone go through how scientist help reduce damage of disposal of polymers to environment?
Full Ums is 87+ - depends on each year!

Source: my teacher
Original post by kelvinbeyioku
look the link https://www.whatdotheyknow.com/reque...ogy_a?unfold=1
for that year 150 ums was 94 marks


the grade boundary for an A that year was 2+ marks lower than the last few most recent sessions so its probably more than 94 for full ums now.
Reply 1792
Original post by kelvinbeyioku
look the link https://www.whatdotheyknow.com/reque...ogy_a?unfold=1
for that year 150 ums was 94 marks


maybe it was like that because the paper was quite difficult because for maths they do that as well :smile:
Original post by TheFootyKing19
Full Ums is 87+ - depends on each year!

Source: my teacher

that would be great :tongue:
Reply 1794
Can someone explain to me how to know which way the Hess's cycle should go? I keep missing a silly mark because of it...
Original post by Jimmy20002012
Could anyone just summarise on how to tackle the infrared and mass spec long answer questions? :smile:


Posted from TSR Mobile


work out empirical formula
look at mass spec for molecular ion peak
therefore you can work out molecular formula
state what bonds are present from the infrared spec
look for fragment ion peaks on the mass spec to confirm what the molecule is - ie. it could be branched or straight chained, a mass spec will help confirm this.

thats pretty much it really, and look at other information in the question. for example if its to do with alcohols, do they tell you if its primary, secondary, or do they tell you what it oxidises to etc.
Original post by kelvinbeyioku
that would be great :tongue:


Just get above 90

And I'm pretty certain that will be above 140 Ums.


Shame OCR don't have Ums converter like AQA
Original post by Jonma
Can someone explain to me how to know which way the Hess's cycle should go? I keep missing a silly mark because of it...


if you're given formation values the arrows go up, if you're given combustion values the arrows go down.
(edited 10 years ago)
Original post by kelvinbeyioku
could someone go through how scientist help reduce damage of disposal of polymers to environment?


sort and recycle
incineration for energy production
crack to make monomers
use as organic feedstock
develop biodegradable/compostable/soluble/photodegradable polymers
Original post by needtosucceed=)
sort and recycle
incineration for energy production
crack to make monomers
use as organic feedstock
develop biodegradable/compostable/soluble/photodegradable polymers


thanks a lot :smile:

Latest