Why would a habitat filled with a breathable oxygen/nitrogen mixture naturally float in the Venusian atmosphere?

Answer

The breathable air mixture acts as a lifting gas in the dense $ ext{CO}_2$ atmosphere

Because the atmosphere is primarily dense carbon dioxide, a mixture containing breathable gases like oxygen and nitrogen becomes buoyant, acting as a lifting gas and allowing the structure to float with minimal energy expenditure for altitude maintenance.

Why would a habitat filled with a breathable oxygen/nitrogen mixture naturally float in the Venusian atmosphere?

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