Calculating concenteration at equilibrium

[harambe]

Homework Statement

0.1mole of N2O4 (g) was sealed In a tube under one atmospheric conditions at 25°C.Calculate the number of moles of NO2(g) present if the equilibrium N204(g) --->2NO2(g) (Kp=0.14) is reached after some time

Homework Equations

K=[NO2]^2/[N2O4]
3. The attempt at the solution

N204(g) --->2NO2(g)

O. 1 0
O. 1-x x

Converting Kp into Kc gives me Kc=0.00572

Kc[NO2]^2/[N2O4]V where V is the volume

But I don't know the volume so I am not able to calculate here.. . Any hint on how to solve this

 

[epenguin]

Yes I think you can't get a numerical answer if you don't know V.

So just get a general answer with an expression that contains v.

 

[neilparker62]

But I don't know the volume so I am not able to calculate here.. . Any hint on how to solve this

Couldn't you find volume from the ideal gas equation: PV = nRT ?