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If a gas like o2 h2 co are taken in a closed vessel containing powdered charcoal it is observed that the pressure of the gas is the enclosed vessel

decreases why?


We all know these:
charcoal becomes soggy in wet weather due to the absorbtion of atmospheric gases


pressure= force/area and force = mass * acceleration

here the same process takes place,where these gases are absorbed,and the mass decreases,air pressure decreases and so does the pressure.

Hope i am correct! 
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