OCR Chemistry Salters B F331 27th May 2016 (Old specification)

what did people get for the calculations?? I defo messed them all up 😑

I can't remember all of mine lol... I got +41 for Hess' law. -30,000andsomething for the energy density (which I think may be wrong), 33.something % for the HNO3 by moles.

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Reply 21

Kwaks

9

Original post by Kaz_96

These were my calculation answers, in order of how they appeared in the q paper
Mass of air: 834.7
Mass of air for 1g of C4H10O: 11.28
Energy Density: 36200
Hess' Law: +41
KNOW: 34.15%

Not sure if theyre right but lemme know if you got the same/different

Got the same as you apart from the last one. The mass of air need question stumped me for a while lol 😂😂

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Reply 22

meg16

1

I can't remeber any of mine what did everyone put for the emission spectra one ?

Reply 23

Taz35

2

Original post by Kaz_96

These were my calculation answers, in order of how they appeared in the q paper
Mass of air: 834.7
Mass of air for 1g of C4H10O: 11.28
Energy Density: 36200
Hess' Law: +41
KNOW: 34.15%

Not sure if theyre right but lemme know if you got the same/different

I got the same for Hess' law and energy density, but that's it 😂 ffs

Reply 24

Kwaks

9

Original post by meg16

I can't remeber any of mine what did everyone put for the emission spectra one ?

I put, the electrons get promoted and then fall to a lower energy level. As they fall they emit a photon. E=hv. Frequency corresponds to a certain colour. And different frequencies produce the other colours. (I think I missed some things)

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Reply 25

SohaXO

3

I said greenhouse gas LOLOLOLOL

Reply 26

Kwaks

9

Original post by SohaXO

I said greenhouse gas LOLOLOLOL

Tbh I actually considered putting that. I ended up going with particulates. 😂😂

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Reply 27

SohaXO

3

Original post by Kwaks

I put, the electrons get promoted and then fall to a lower energy level. As they fall they emit a photon. E=hv. Frequency corresponds to a certain colour. And different frequencies produce the other colours. (I think I missed some things)

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I did the same :smile:

)))

Reply 28

meg16

1

I considered that too you are not alone 😂 I think particulates is right j thought about it but thought they meant a group of emissions so that threw me

Reply 29

Kaz_96

OP

8

Original post by Taz35

I got the same for Hess' law and energy density, but that's it 😂 ffs

Im not necessarily right though haha

Reply 30

Kwaks

9

The question when is asked to give a mathematical equation for the energy transferred was: E=m x c x triangleT????

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Reply 31

meg16

1

Original post by SohaXO

I did the same :smile:

)))

Yes I wrote the same but said strong line at red as absorbed from the red area visible light spec and at the highest frequency as from highest energy level

Reply 32

JgR1997

2

I thought for the mol and mass calculation questions they were asking the same question but then I read it carefully and it the same answer as people on here