Phosphorous acid, phosphoric acid and molecular compound (Molecular Compound) related to classical Chinese, the following is the creation:

Q: "Phosphoric acid, can it be a molecular compound?" Yes: "Phosphoric acid, its structure is connected by atoms in covalent bonds. Looking at its microscopic state, atoms are bonded in a specific order and way to form an independent molecular structure. And its properties are characteristic of molecular compounds, the melting boiling point is not high, soluble in appropriate agents, and can exist in the gas and liquid phases as molecules. Therefore, phosphorus acid is indeed a molecular compound."