H2C2O4(aq) + HPO4^2- --> HC2O4^- + H2PO4-
<span>The conjugate base of a weak acid is the anion which remains when H+ is removed. </span>
<span>H2C2O4 <==> H+ + HC2O4^- </span>
<span>acid ............. .......... conjugate base </span>
<span>H2PO4^- <==> H+ + HPO4^2- </span>
<span>acid ............. .......... conjugate base</span>
Answer: Central America is a land bridge connecting the North and South American continents, with the Pacific Ocean to its west and the Caribbean Sea to its east. A central mountain chain dominates the interior from Mexico to Panama. The coastal plains of Central America have tropical and humid type A climates.
Explanation:
The answer to the first question is: the king of India, he never conquered India. The answer to the second: Phalanxes. The phalanxes were based on the usage of long spears, that would stop the enemy advancing.
I believe that it is biology. Biology was found in the 11th century. It studies life and living organisms including their physical structure, chemical processes, molecular interactions, physiological mechanisms, development and evolution.
