Kc

[Jose Robles 1D]

Do we use the reactants and products regardless if they are not gases?

[Kate Osborne 1H]

if something can have a concentration you have to include it i believe, gases/aqueous.

[TarynD_1I]

You'd use concentration of products over reactants for gaseous and aqueous, not liquid and solid.

[vibha gurunathan 1h]

for gases and aqueous substances you use concentrations

[AronCainBayot2K]

You may only use aqueous or gas molecules since they have concentrations.

[gabbymaraziti]

You use any products and reactants so long as they are not liquids or solids.

[Gurmukhi Bevli 4G]

Provided they are in a gaseous or aqueous state, but not if they are liquids or solids.

[Tahlia Mullins]

Also, if there is a liquid or solid in either the products or the reactants, they would just be included in Kc as 1, so obviously they can be disregarded. I like to include this just for clarity.