What is absolute humidity?

What is relative humidity?

True or False : Absolute humidity is measured in g // m^(3)

50m^(3) of saturated vapour is cooled down from 30^(@)C to 20^(@)C .Find the mass of the water condensed. The absolute humidity of saturated water vapour is 30g m^(-3) at 30^(@)C and 16g m^(-3) at 20^(@)C .

What is absolute alcohol ?

Distinguish between Absolute humidity and Relative humidity.