AS Chemistry- helping each other out!

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Reply 2780

C0balt

Original post by Shadowfire123

thanks do you know what paper this is from

I don't know lol it's not edexcel for sure

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Reply 2781

Supermanxxxxxx

Does anyone know why it's a r paper tommoroe

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Reply 2782

Shadowfire123

Original post by C0balt

100cm3 is decomposed
Same number of moles will be present in 100cm3 of ammonia gas and 100cm3 of nitrogen under same condition
So it is now like just moles calculation with equation ratio. From ammonia and nitrogen are in 2:1 ratio from the coefficient of the equation, so you can now deduce the ""number of moles""=volume of nitrogen

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thanks but you know the ration between ammonia and nitrigen
and ammonia and hydrigen can you show me the calculation to wrok tht out please

Reply 2783

Shadowfire123

Original post by C0balt

I don't know lol it's not edexcel for sure

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cannot risk it though its gonna be r paper which might pop up

Reply 2784

Shadowfire123

Original post by Supermanxxxxxx

Does anyone know why it's a r paper tommoroe

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because the actual paper got leaked for 4 days last week apparently

Reply 2785

C0balt

Original post by Shadowfire123

thanks but you know the ration between ammonia and nitrigen
and ammonia and hydrigen can you show me the calculation to wrok tht out please

Given the equation for the reaction, just look at the stoichiometry of the species? (The coefficient)
They are the ratio

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Reply 2786

C0balt

Original post by Shadowfire123

because the actual paper got leaked for 4 days last week apparently

Are you ****ing serious
I thought it was only maths

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Reply 2787

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??

Reply 2788

frozo123

Original post by Shadowfire123

because the actual paper got leaked for 4 days last week apparently

send me a link for proof or bs

Reply 2789

Shadowfire123

Original post by C0balt

Given the equation for the reaction, just look at the stoichiometry of the species? (The coefficient)
They are the ratio

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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

Reply 2790

nishofficial

The number of unpaired electrons in a nitrogen atom in its ground state is
A 0
B 1
C 2
D 3

How do you work this out??

Reply 2791

Shadowfire123

Original post by C0balt

Are you ****ing serious
I thought it was only maths

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Every single edexcel paper have been leaked i believe

Reply 2792

Shadowfire123

Original post by frozo123

send me a link for proof or bs

I cant edexcel have taken off the things but it was a friend who told me

Reply 2793

frozo123

Original post by Shadowfire123

I cant edexcel have taken off the things but it was a friend who told me

I doubt there has been a leak

Reply 2794

xMillnsy

Can someone link me to past paper mole calculations questions where the solution is 'made up to x cm^3'. Thanks

Reply 2795

Shadowfire123

Original post by nishofficial

The number of unpaired electrons in a nitrogen atom in its ground state is
A 0
B 1
C 2
D 3

How do you work this out??

its easy I did this question now its from jan IAL 2014 paper q 4 multiple choice look at the periodic table and you see nitrogen is in the 5th group meaning it needs 3 more elctron to make a full outer shell that why its asking

Reply 2796

samb1234

Original post by Shadowfire123

Every single edexcel paper have been leaked i believe

I very much doubt it has. There was no evidence that the maths paper was actually leaked apart from people hearing it from someone else who heard it from someone else etc.

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Reply 2797

nishofficial

Original post by Shadowfire123

Thanks, yeah Im going through that paper right now do you think it was an easy paper?

Reply 2798

Shadowfire123

Original post by samb1234

I very much doubt it has. There was no evidence that the maths paper was actually leaked apart from people hearing it from someone else who heard it from someone else etc.

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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