The ________expresses the mass of water vapor existing in a given mass (g/kg)of air.

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Specific humidity is the mass of water vapor present in a unit mass of moist air, typically expressed in grams of water vapor per kilogram of moist air (g/kg). Absolute humidity is a measure of the total amount of water vapor in the air, regardless of the air temperature and pressure, and is typically expressed in grams per cubic meter (g/m³). Wet-bulb depression is a measure of the difference between the dry-bulb temperature (measured by a normal thermometer) and the wet-bulb temperature (measured by a thermometer with a wet wick) and is used to calculate other humidity indices. Relative humidity is the ratio of the partial pressure of water vapor in the air to the maximum possible pressure of water vapor in the air at a given temperature, expressed as a percentage.

The ________Expresses the Mass of Water Vapor Existing in a Given