Provide the name of the oxyanion of the acid: h2co3(aq).

Explanation:

H₂CO₃ is an oxyacid, which is the general name for the acids that contain oxygen, i.e. the chemical formula for an oxyacid contains hydrogen, a nonmetal, and oxygen: HₐXₓOₙ.

When an oxyacid ionizes it forms protons (H⁻) and oxyanions.

When H₂CO₃(aq) inonizes completely it does it according the equation:

Meaning that it inoizes into two H⁺ cations and one CO₃²⁻ anion.  The latter is the oxyanion.

Cations are positive ions. Anions are negative ions.

The name of H₂CO₃ is carbonic acid. From that you must know that the name of the oxyanion CO₃²⁻ is carbonate: the root ic from the acid changes to ate in the anion.

Summarizing:

Additionally, you must know that when only one proton (instead of two) is released from the acid you form the ion HCO₃⁻ which is named bicarbonate or hydrogen carbonate.

if the temperature drops and becomes cool

then the atmosphere can be freezing as the water vapor in the air is at maximum (100%) and can be severely cold

also can be snowing lightly as the moisture in the air will start to solidify

and btw this is not chemistry but