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- Limestone rocks are composed mainly of calcium carbonate (CaCO3) that reacts easily with an acid, releasing carbon dioxide gas.Complete and balance the following equations. Write the entire equation, including the reactants and products, and include the physical state of each species. (a) K(s) + H2O(l)→ (b) NaH(s) + H2O(l)→Complete the balanced chemical reaction for the following weak base with a strong acid. In this case, write the resulting acid and base as its own species in the reaction. CH3NH2(aq)+HClO3(aq) ->