Final answer:
The correct option is c. H₃PO₄, known as phosphoric acid, which is formed when hydrogen ions combine with a phosphate ion. The other options listed incorrect names for the acids they represent.
Step-by-step explanation:
The correct formula and name of an acid among the choices given is c. H₃PO₄, phosphoric acid. This is because hydrogen ions (H+) combine with the phosphate ion (PO43-) to form phosphoric acid.
Looking at the other given choices, the correct name for HClO₂ is chlorous acid and not chloric acid. The formula HNO₂ is correctly paired with the name nitrous acid, whereas hydronitrous is not a correct terminology. Lastly, HI is correctly named hydroiodic acid, not iodic acid.
Let's address some of the references provided:
- Perchloric acid is represented by the formula HClO₄, not HClO.
- Hydrosulfuric acid's formula is H₂S.
- Phosphorous acid is represented by the formula H₃PO₃.