A.)[ch4][h2o]/[co][h2]3
b.)[co][h2]3/[ch4][h2o]
c.)[h2o][h2]3/[ch4][co]

A.)[CO2][ZnO]/[ZnCO3]
B.)[CO2]
C.)[CO2]/[ZnCO3]

A.)is homogenous
B.)is at equilibrium under any condition
C.)is heterogeneous

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I'll give you an example of the equilibrium expression for another equation.





But since I_2 is a solid, then, P_(I2) = 1

Thus;








Then, what is the definition of homogeneous and heterogeneous?
By what is an equilibrium affected?