What happens when water is exposed to air and contains CO2 ? A. Acidity increases

B. Acidity remains the same

C. Water remains unchanged

B

Explanation:

Co2 isn't an acid

- "the choice that is not an indicator of a chemical change is "state of matter changes". more common than not, chemical reactions produce energy in the form of light or heat. along with energy, they also produce a new substance called the product that could be in any state of matter (solid, gas, or liquid)."

atomic number of carbon is 6

electronic configuration of carbon is 1s²2s²2p²

orbital diagram of carbon is as shown here in the image.