Is wet air more heavier than dry air?

Likewise, why density of dry air is more than moist air?

At 18 atomic units, water vapor is lighter than diatomic Oxygen (32 units) and diatomic Nitrogen (28 units). Thus at a constant temperature, the more water vapor that displaces the other gases, the less dense that air will become. You may be familiar with the concept that moist air is less dense than dry air.

Additionally, why does humid air feel heavy? One reason is because the moisture in the air can make it a little more difficult to breath. The moisture can make the nose and lungs feel stuffy and this stuffy feeling can produce a feeling of heaviness. Another reason is because sweat does not evaporate as efficiently in humid air as compared to dry air.

Also question is, what is the difference between wet air and dry air?

From the above definition, we can see that the main difference between the wet air an dry air comes from the level of moisture in the air. In the winter-like and saturated air, there is approximately 2 g/kg of water vapor, while the tropical-like air has about 20 g/kg of water vapor.

Why does adding moisture to air make it lighter?

This means that when a given volume of air is made more moist by adding water molecules, heavier molecules are replaced with lighter molecules. Therefore, moist air is lighter than dry air if both are at the same temperature and pressure.