Which of the chemicals in the following chemical reaction is the acid? HCO3- + H20 -->CO3^2- +H30+

A.) HCO3-
B.) co3²-
C.) H30+
D.) H20

Answerδh > 0explanationc₆h₆  (s)  → c₆h₆ (l)if you are changing it from a solid to a liquid, you are pretty much melting the solid. this requires heat energy. therefore, the reaction is endothermic (takes in energy); the system enthalpy increases as the reaction proceeds: δh > 0.

The se-ci  bonds is more polar  than s-br bond