I think it is most likely B. Some elements found in nature exist as molecules. Like for instance the element of oxygen. We can think of it in nature as a diatomic molecule,
Answer:
not goin to be rude but I don't even get the question??
Mole percent is the percentage of the total moles that is of a particular component.
Answer: pH = 7.36. The pKa of H2PO4− is 7.21.
Explanation: