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AS Chemistry- helping each other out!

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Could someone explanthe differentforces please in detail
Original post by nishofficial
Thanks, yeah Im going through that paper right now do you think it was an easy paper?


im stuck on question 3 on that paer can you explain the answer as well if you know please
Original post by Kitty201322
Could someone explanthe differentforces please in detail


which forces
van der waals
hydrogen bonds
and dipole dipole
Original post by Shadowfire123
its challenging I would say but its better if you get these question right as the r paper has a mixture of these hard questions


Are you even sure that school's get delivered R papers along side non-R papers? I thought schools only got delivered papers that their candidates sit (I.e. they get sent the papers that the candidates sign up for) to avoid leaks and possible cheating. It would be logistically impossible to send all the colleges R papers in time for tomorrow's exam.
Original post by Shadowfire123
im stuck on question 3 on that paer can you explain the answer as well if you know please


MCQ Q3? Its D because a magnetic field is what accelerates the positive ions. Electron gun ionises them
Original post by Shadowfire123
its true both c1 and c2 were leaked

someone posted on twitter the paper as a picture having the paper obviously the cover but it was an hour before the exam so its too late to change the paper thn


They investigated and there was no evidence that it was actually leaked. Stop worrying about whether the paper was leaked anyway it makes no difference to you what paper we sit.

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Original post by nishofficial
MCQ Q3? Its D because a magnetic field is what accelerates the positive ions. Electron gun ionises them


the ms said it is c for jan 2014 IAL paper
Original post by samb1234
They investigated and there was no evidence that it was actually leaked. Stop worrying about whether the paper was leaked anyway it makes no difference to you what paper we sit.

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im not worried

just want to do well
Original post by Shadowfire123
you said ammonia to nitrogen was 2 to 1 ratio so what i did was take 500 and divide it by 2 which gace me 250 and you said 50 nitrogen was produced


It says 20% of ammonia is decomposed
So 100cm3 decomposed


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Original post by Shadowfire123
im not worried

just want to do well


They get replaced with a paper of equal difficulty anyway

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Original post by C0balt
It says 20% of ammonia is decomposed
So 100cm3 decomposed


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I just figured that out but niw I am wondering where 400 came from
Original post by catherinemcc
Can anyone help me with this question:

Like ammonia, hydrazine is a base that reacts with water to form negative and positive ions. (we know hydrazine is H2N-NH2)
i) Write the formula of the negative ion that is formed when hydrazine reacts with water
ii) Suggest the formula of a positive ion which might form when hydrazine reacts with water

The answers are:-
i) OH-
ii) N2H5+ or N2H6+

Although I've got no idea how you would get these as your answers??


For the second part, as the hydrazine acts as a base, this means it is a proton acceptor (definition), so the N2H4 accepts a H+ ion to form N2H5+.

Not sure how to explain the first part, but the other ion in water is OH-, so I suppose that is what is left when the N2H4 accepts the H+? (sorry for terrible explanation)
Original post by samb1234
They get replaced with a paper of equal difficulty anyway

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its more difficult
Original post by Shadowfire123
its more difficult


You have no way of knowing as you can't see any of the replacement papers

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Original post by Shadowfire123
the ms said it is c for jan 2014 IAL paper


Sorry, yes it is C. That question was very sneaky. I've learnt it as it being accelerated by an electric field. A magnetic field is used for deflection. Charged plates would act in the same way as an electric field
Original post by samb1234
You have no way of knowing as you can't see any of the replacement papers

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its always is when international question are put in it
Original post by Shadowfire123
I just figured that out but niw I am wondering where 400 came from


500-100=400
The ammonia that hasn't decomposed is still present.


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Original post by nishofficial
Sorry, yes it is C. That question was very sneaky. I've learnt it as it being accelerated by an electric field. A magnetic field is used for deflection. Charged plates would act in the same way as an electric field


i see i was thinking of c but

whats a charged plate
Original post by C0balt
500-100=400
The ammonia that hasn't decomposed is still present.


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ohh i did 80/100 times 500 which gave me 400 i dont knnow if its right to do it this way
Original post by Shadowfire123
ohh i did 80/100 times 500 which gave me 400 i dont knnow if its right to do it this way


when i figure out something and about to message you saying dont bother i figured it out you message than i feel bad

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