The brown gas NO2 and the colourless gas N2O4 exist in equilibrium. N2O4(g) (2NO2(g) 0.625 mole of N2O4 was introduced into a 5.00 L vessel and was allowed to decompose until it reached equilibrium with NO2. The concentration of N2O4 at equilibrium was 0.0750 M. Calculate Kp for the reaction.

the electronic configuration of an atom with eight electrons is 1s²2s²2p⁴. the orbital diagrams are shown in the figure.

as per the hunds rule:

1. electrons tend to avoid being in the same orbital as per as practicable.

2. electrons in different orbitals of the same energy will have their spin parallel.

this can be illustrated from the multiplicity of the orbitals of the atom. as there are four electrons in the p orbital and p orbital has 3 sub-shells. the electrons can be fed in different ways as shown in the figure but the correct orbital diagram will be as per the hunds rule.

the dissociation of nickel hydroxide is follows:

the concentration of hydroxide ion is

the equilibrium constant value of nickel hydroxide is = 6.1 * 10^-^1^6 and thus equilibrium equation can be written as:

thus, concentration of ni is 0.23 * 10^-^4 mol /l

i believe the answer is three water molecules