Help in Chemistry

[HUSH1994]

Hey wassup everyone,
MJ 2006 Paper 1 Q3 & 10 please
In question 10 i know that the Kp is the pressure of the products over the reactants,which is p(NO2)^2
----------
p(N2O4)
so how do you get the partial pressures for each.


Thanks,
HUSH

 

[hassam]

find mol fraction.....multiply this by total pressure.....u ll get the partial pressure

 

[msk]

q3.... configuration of nitride ion is requires...N has 7 electrons it forms N-3....so 10 electrons....i.e 1s2 2s2 2P6...So D is the answer

 

[HUSH1994]

Thanks guys,can anyone help me with Q11 ON 2006 P1 please

 

[msk]

dude see.... mole of ethanol and ethanoic acid at stat 1....moles of products 0
now at equilibrium mole of reatants 1-x......mole of products 0+x

so kc = x2/(1-x)2 (2 means square)

solve it n u get 2/3