Weegy: A chemical equation shows the ratio of C. atoms of reactants and products. User: When magnesium carbonate, MgCO2, reacts with nitric acid, HNO3, it forms magnesium nitrate, Mg(NO3)2, and carbonic acid, H2CO3. Carbonic acid then breaks down into water and carbon dioxide. Which two types of reactions take place in this process?
A. synthesis and decomposition
B. single-replacement and combustion
C. double-replacement and ... (More)