It depends on the specific compound, though most are denser than air.
Ammonia (NH3), as used commercially, is often called anhydrous ammonia. This term emphasizes the absence of water in the material.Anhydrous ammonia gas is lighter than air and will rise, so that generally it dissipates and does not settle in low-lying areas. However, in the presence of moisture (such as high relative humidity), the liquefied anhydrous ammonia gas forms vapors that are heavier than air. These vapors may spread along the ground or into low-lying areas with poor airflow where people may become exposed.
If "heavier than" in the question is interpreted to mean "has an atomic mass greater than", the answer is nitrogen
Vapors from acetic acid are slightly heavier than air, so they will tend to settle towards the floor rather than rise to the ceiling. However, ventilation and air currents in the room can affect the distribution of the vapors.
Gasoline vapors, being heavier than air, can accumulate in low-lying areas. If these vapors come into contact with a spark or open flame, they can ignite, leading to a fire or explosion due to the volatile nature of gasoline. It is important to handle gasoline with caution and follow safety guidelines to prevent accidents.
The molecular weight of carbon dioxide is heavier than oxygen. Oxygen has a molecular weight of 32 g/mol, while carbon dioxide has a molecular weight of 44 g/mol. Therefore, carbon dioxide is heavier than oxygen.
The molecular weight of the gas or vapor plays a key role in determining whether it is lighter or heavier than air. Gases or vapors with lower molecular weights are typically lighter than air and will rise, while those with higher molecular weights are heavier and tend to sink. Temperature and pressure can also impact the behavior of gases and vapors relative to air.
heavier because they are two different weights
Helium is lighter than air
They sink below the air.
tungsten is more more heavier han the lead as it has great mass in less volume
LIGHTER
Just, simply, Lighter than Air Vehicles are lighter than air, so that makes them fly, and Heavier than air vehicles are heavier than air, but they use airfoils on the wings to fly.
rhenium
hydrogen
One is lighter and the other one is heavier. :D
Tritium is lighter than deuterium. Tritium is a hydrogen isotope with one proton and two neutrons, making it heavier than regular hydrogen but lighter than deuterium, which has one proton and one neutron.
Nitrous Oxide is heavier than air.