Posted by anynomous on .
What is the Kc for the following reaction at equilibrium at 800∘C if [CO2]= 0.030M ?
CaCO3(s)⇌CaO(s)+CO2(g)

chemistry will somebody please help!! 
DrBob222,
Solids don't count in equilibrium equations for K (technically they are 1.0), therefore,
Kc = (CO2) = 0.0300