Nitrogen dioxide, NO2, is a red-brown gas that reacts with itself to produce N2O4, a colorless gas: A flask of nitrogen dioxide gas is actually

Nitrogen dioxide, NO2, is a red-brown gas that reacts with itself to produce N2O4, a colorless gas:

A flask of €œnitrogen dioxide€ gas is actually a mixture of NO2 and N2O4. It is possible to obtain the equilibrium constant Kp for this reaction from the density of an equilibrium mixture at a given temperature and total pressure. To see how to do that, answer the following questions. (You might find it helpful to refer to the derivation of the equation relating molar mass and density at the end of Section 5.3, on ideal gases.)

2NO2(g)N204(g)