Air at a temperature of 20Â°C and 750 mm Hg pressure has a relative – McqOptions

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1.	Air at a temperature of 20Â°C and 750 mm Hg pressure has a relative humidity of 80%. What is its percentage humidity ? Vapour pressure of water at 20Â°C is 17.5 mm Hg.
A.	80.38
B.	80
C.	79.62
D.	78.51
Answer» D. 78.51

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