[UniKingg]

I get confused and I'm stressing because the structural formula I wrote was the one showing the bonds. And the display formula I wrote for the 2 marker following it.

In my defense I crossed out the wrong answer with the most pathetic of lines so I could still get it. I assumed that the atom economy was 100% and the reason for the enthalpy I put as it loses heat due to the copper heat loss

[Ataraxian-Walker]

(Original post by amberee)
yeah for the species everyone had that answer
do you think they'll allow just writing Cl[SUP]35 or would you need the whole thing I wasn't sure about that one and did it at the last minute so not enough time to write it all

I think so I'm not so sure.

[taxicab94]

Hi guys, i no it sounds funny but what was up with the first ppm question, I got really confused, what was it?

[tomey17]

(Original post by taxicab94)
Hi guys, i no it sounds funny but what was up with the first ppm question, I got really confused, what was it?

0.0666 i think

[sabre2th1]

(Original post by Ataraxian-Walker)
It was Cl³⁵ + Cl³⁵ and Cl³⁷ + Cl³⁷.
And the next question was Cl³⁵ + Cl³⁷.

What if you wrote the numbers to the left of the element? Eg 35Cl + 37Cl

[sabre2th1]

(Original post by taxicab94)
Hi guys, i no it sounds funny but what was up with the first ppm question, I got really confused, what was it?

I was confused but then I did 66/1000000 = 6.6 x 10 -5

then I divided each of the answers by 1000 (1 kg) and chose the answer that was the same as the above

[Ataraxian-Walker]

(Original post by sabre2th1)
What if you wrote the numbers to the left of the element? Eg 35Cl + 37Cl

Yeah that's totally fine

[YellowAndBlack]

(Original post by Ataraxian-Walker)
It was Cl³⁵ + Cl³⁵ and Cl³⁷ + Cl³⁷.
And the next question was Cl³⁵ + Cl³⁷.

I don't think Cl37 + Cl35 will not be detected in the mass spectrometer
Don't they need to be positive ions ... Cl37+ Cl35+ etc ...

[YellowAndBlack]

(Original post by sabre2th1)
What if you wrote the numbers to the left of the element? Eg 35Cl + 37Cl

That's fine, but did you put the + indicating positive ions ?

[taxicab94]

Oh, I got it wrong, I put D.

[Killer_94]

for the enthalpy question did anyone get -607... and for the oxygen I got 0.9dm
I thought this was fairly easy paper... but i hope the grade boundaries aren't that high

[Ataraxian-Walker]

(Original post by YellowAndBlack)
I don't think Cl37 + Cl35 will not be detected in the mass spectrometer
Don't they need to be positive ions ... Cl37+ Cl35+ etc ...

I really have no idea, i just put those If we had to put Cl³⁵⁺, i probably messed up the question.

[007Shella]

(Original post by YellowAndBlack)
That's fine, but did you put the + indicating positive ions ?

OH NOOOOO

so is it wrong without putting the + sign??

[YellowAndBlack]

(Original post by 007Shella)
OH NOOOOO

so is it wrong without putting the + sign??

I'm not 100% sure, but this was a mass spectrometry question and they detected when they are POSITIVE IONS

[Booyah]

I just put the numbers... FML

[117r]

(Original post by amberee)
I have a feeling your going to need something crazy like 70/80 to get an A. Everyone at my school found this paper pretty easy going compared to January

They've never been anywhere near that high, don't worry.

I'm thinking A=62, B=56

[Nitronite]

You know, I actually think that both will be right. As in both with and without the positive signs.

[sabre2th1]

(Original post by Ataraxian-Walker)
Yeah that's totally fine

Thanks

(Original post by YellowAndBlack)
That's fine, but did you put the + indicating positive ions ?

AH! No..

(Original post by Killer_94)
for the enthalpy question did anyone get -607... and for the oxygen I got 0.9dm
I thought this was fairly easy paper... but i hope the grade boundaries aren't that high

Yeah -607 but I got 1.8 dm3

[YellowAndBlack]

(Original post by 117r)
They've never been anywhere near that high, don't worry.

I'm thinking A=62, B=56

A will be 58 I think .. B 52

It wasn't too much different from January

[117r]

(Original post by YellowAndBlack)
A will be 58 I think .. B 52

It wasn't too much different from January

Well I certainly hope so. I actually though it was quite hard - lots of sneaky questions. Just loads of people found it very easy...