Question
For the equilibrium: $CaCO_3(s) \rightleftharpoons CaO(s) + CO_2(g); \ K_p = 1.64\ \text{atm at}\ 1000\ \text{K}$
50 g of $CaCO_3$ in a 10-liter closed vessel is heated to 1000 K. The percentage of $CaCO_3$ that remains unreacted at equilibrium is