Final answer:
Copper carbonate typically forms from the reaction between copper, carbon dioxide, and water, rather than directly from a reaction with a gas other than oxygen.
Step-by-step explanation:
Apart from oxygen, other gases can react with copper to form copper carbonate. However, copper carbonate is typically formed when copper reacts with carbon dioxide and water, particularly in the presence of air. In the context of the provided information, no specific mention of a reacting gas aside from oxygen that directly forms copper carbonate is given. Therefore, we usually consider copper's exposure to a combination of carbon dioxide (CO2) and moisture to eventually lead to the formation of copper carbonate, often seen as a greenish patina on copper surfaces. It should be noted that various oxidizing agents, such as ozone, chlorine, and nitric acid, can also oxidize copper, but they do not form copper carbonate directly.