Question

At 900 °C, K_c = 0.0108 for the reaction

CaCO₃(s) CaO(s) + CO₂(g)
A mixture of CaCO₃, CaO, and CO₂ is placed in a 10.0-L vessel at 900 °C. For the following mixtures, will the amount of CaCO₃ increase, decrease, or remain the same as the system approaches equilibrium?
(a) 15.0 g CaCO₃, 15.0 g CaO, and 4.25 g CO₂
(b) 2.50 g CaCO₃, 25.0 g CaO, and 5.66 g CO₂
(c) 30.5 g CaCO₃, 25.5 g CaO, and 6.48 g CO₂