Carbon dioxide is split to form oxygen gas and carbon compounds

I believe that the correct answer here is:

“in neither photosynthesis nor respiration”

This is because during photosynthesis, carbon dioxide is converted to glucose.

While during respiration, carbon dioxide is not split because it is one of the products of respiration hence it is rather created.

in theory, limestone is composed principally of the compound calcium carbonate - caco3, but in reality this compound is deposited in conditions involving a number of other compounds as impurities so it ends up being a mixture of many compounds.

hope this : -)

tony (lordcaos066)

it is called acid bonding