Volume of some air saturated with water vapour is 80 cm^3 at the pressure of 74 cmHg .Keeping the temperature fixed, if pressure is taken to 146 cmHg, then the volume becomes halved. What will be the pressure ( in cmHg) of water vapour then?

Volume of some air saturated with water vapour is 80 cm^3 at the press

1.	Volume of some air saturated with water vapour is 80 cm^3 at the pressure of 74 cmHg .Keeping the temperature fixed, if pressure is taken to 146 cmHg, then the volume becomes halved. What will be the pressure ( in cmHg) of water vapour then?
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