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Advanced notice paper F332 OCR SALTERS B

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Reply 160
Avatar for super121
super121
5
Original post by yugiohtheawesome
Thanks I get it now :biggrin:

I have another question

I don't understand how the release of NOx at the earth's surface damages the ozone layer?


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They photodissociate to form radicals which then react with ozone to form oxygen.
(edited 10 years ago)
Enjoy.

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Does anyone know what we need to do differently if given a calculation question on ppb? I'm worried because we have practiced ppm calculations but all the values in this are ppb (parts per billion) :frown:
Reply 163
Avatar for super121
super121
5
Original post by Jlane5000
Does anyone know what we need to do differently if given a calculation question on ppb? I'm worried because we have practiced ppm calculations but all the values in this are ppb (parts per billion) :frown:


Instead of multiplying/dividing by 10,000, you would multiply/divide by 10,000,000
Original post by super121
Instead of multiplying/dividing by 10,000, you would multiply/divide by 10,000,000


cheers :biggrin:
Omg guys Wha tis pre release material are we supposed to know for OCR A Chemistry F322 exam on 4th June????
We didn't do all these things ... *cnfused*
Reply 166
Avatar for super121
super121
5
Original post by Jacksgap
Omg guys Wha tis pre release material are we supposed to know for OCR A Chemistry F322 exam on 4th June????
We didn't do all these things ... *cnfused*


It's not for OCR A, it's for OCR B salters.
Original post by super121
It's not for OCR A, it's for OCR B salters.


thank youu :colondollar:
Reply 168
Avatar for krisshP
krisshP
14
Original post by Jacksgap
Omg guys Wha tis pre release material are we supposed to know for OCR A Chemistry F322 exam on 4th June????
We didn't do all these things ... *cnfused*


You are not in this messed up spec, so don't worry :smile:
Reply 169
Avatar for Hilz14
Hilz14
Original post by Jacksgap
thank youu :colondollar:


i made the same mistake on an F322 thread lool
Original post by Hilz14
i made the same mistake on an F322 thread lool


me to haha

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Reply 171
Avatar for Branny101
Branny101
Just to clarify % to ppbv you x 10,000,000 and divide for vice versa? Thanks.

Oh and could someone explain this wet and dry deposition stuff it's confusing me :frown:

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Original post by Branny101
Just to clarify % to ppbv you x 10,000,000 and divide for vice versa? Thanks.

Oh and could someone explain this wet and dry deposition stuff it's confusing me :frown:

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Ok so wet deposition is the removal of substance through by acid rain, snow and fog (you see they are what we would call WET things)
Dry deposition is the removal of substance when acidic chemicals are incorporated with dust and smoke so they stick to cars and tress (so it's usually lost to dry things)

Do you get it?
Reply 173
Avatar for Branny101
Branny101
Original post by Whostolemycookie
Ok so wet deposition is the removal of substance through by acid rain, snow and fog (you see they are what we would call WET things)
Dry deposition is the removal of substance when acidic chemicals are incorporated with dust and smoke so they stick to cars and tress (so it's usually lost to dry things)

Do you get it?


Ahhhh thanks, makes total sense :smile:

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Question: When ozone absorbs infrared radiation it vibrates but how does this cause the troposphere to warm up?
Original post by Whostolemycookie
Question: When ozone absorbs infrared radiation it vibrates but how does this cause the troposphere to warm up?


the vibrational energy within the bonds increase---the molecules move faster---the vibrational energy in transferred to kinetic energy which raises atmospheric tempereature. and some of the ozone molecules re-emit the absorbed Infared in all direction some of which warm the earth.
this is a model answer, use it for any question like that.

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Original post by Rubyturner94


Thanks :biggrin:
Original post by Whostolemycookie
Question: When ozone absorbs infrared radiation it vibrates but how does this cause the troposphere to warm up?


Vibrational energy get's converted to kinetic energy which then goes on to raise the temperature
Another question sorry, but when the shape of a molecule is bent is it aways 104.5 or can it sometimes be 120?
Original post by Whostolemycookie
Another question sorry, but when the shape of a molecule is bent is it aways 104.5 or can it sometimes be 120?


no, if its bent they say within the ranges 104-109. 120 is for planar molecules.

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