Calcium carbonate undergoes thermal decomposition CaCO3(s) ⇌ CaO(s) + CO2(g) at high temperatures. The equilibrium constant for the reaction is 0.0120 at 900 K. Calculate the partial pressure of carbon dioxide, CO2, when calcium carbonate, CaCO3, is heated at 900 K. 2. Calculate the standard cell potential for the reaction Zn(s)|Zn^2+(aq)||MnO^4-(aq), Mn^2+(aq), H+(aq)|Pt(s) 3.

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