It is measured in terms of percentage of humidity. A device to measure humidity is called hygrometer. The relative humidity of air can be measured by dry and wet bulb method.
This is called the absolute humidity, usually expressed in grams of water vapor per kilogram of air, but also by water vapor per unit volume of air (e.g. grams per cubic meter).
Humidity.
hygrometer
by a measure of the quantity of water vapor in the air
Immerse it in water and its volume is equal to the volume of water displaced
First you must understand "density." Density is the amount of atoms in a given volume. You can artificially create situations when there are more atoms in a given volume where the atoms are either "dry air" or "water vapor." But in ordinary situations, water vapor is mixed with what we call "air" and in ordinary situations, "dry air" has less water vapor in a given volume, so, people tend to say that water vapor is "heavy" or more "dense" than "air" or "dry air."
Absolute humidity
Water Vapor Because If The Air Did Not Have Wator Vapor In It, It Would Be Very Staticy And Dry!
If it remains sealed the volume remains the same.
This is called the absolute humidity, usually expressed in grams of water vapor per kilogram of air, but also by water vapor per unit volume of air (e.g. grams per cubic meter).
Relative humidity is a ratio of the actual water vapor content of the air to the amount of water vapor needed to reach saturation. Absolute humidity is the mass of water vapor contained in a given volume of air.
Relative humidity
Density aka specific gravity is a measure of the amount of matter in a given volume. Actually specific gravity is not the measure of the amount of matter in a given value, it is a comparison of the density of the substance to water's density. Specific gravity is a unitless quantity.
The volume is 27,8 L.
humidityHumidity.
humidityHumidity.
Water vapor.