Answer :

We know ideal gas equation


PV=nRT


Where V= volume of gas


R=gas constant


T=temperature


n=number of moles of gas


P=pressure of gas.


Given


Volume V=0.02 m3


Temperature T=300K


Mass of hydrogen gas = 2g


Number of moles n =


Molar mass of hydrogen=2amu


mol


From ideal gas equation, we can write


Pa


Pressure in the vessel is Pa.


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