Carbon dioxide is approximately 50 percent heavier than air
Carbon Dioxide is less denser than air.
Carbon dioxide is more dense than air.
The density of a gas is directly propotional to its molecular mass. The main components of air are diatomic nitrogen and oxygen, which have molecular masses off approximately 28 AMU (atomic mass units) and 32 AMU respectively. Carbon dioxide has a molecular mass of approximately 44 AMU.
Air consists mostly of Nitrogen. Nitrogen's Molar Mass is 14.01. Carbon Dioxide's Molar Mass is 44.01. Therefore CO2 is more dense that Air (surrounding gasses)
Carbon dioxide has a higher density than air. This is why it can accumulate in low-lying areas and pose a risk of asphyxiation if not properly ventilated.
Carbon dioxide is denser than air. The density of carbon dioxide is 1,977 g/L at 0 0C and standard pressure. The density of air (the so called International Standard Atmosphere) is 1,225 g/L.
The specific gravity of sulfur dioxide is 2.24 so it is more than twice as dense as air.
Dry ice, carbon dioxide, is more dense than air.
Helium is a relatively light gas which is lighter than air at ground level. Exhaled air contains a lot of water vapour and carbon dioxide relative to normal air. Since ground level air is less dense than helium, adding water vapour and carbon dioxide makes exhaled air even more heavier than helium.
Carbon dioxide.
In an atmosphere of carbon dioxide, warm carbon dioxide would rise. Since carbon dioxide is better than twice as dense as air, it would need to be really hot before it would rise.
Helium rises because it is less dense than the surrounding air. On the other hand, carbon dioxide sinks because it is more dense than the surrounding air. This difference in density causes helium to float upward and carbon dioxide to sink downward.