1.

Calculate the number of moles of gas present in the container of volume 10L at 300K. If the manometer containing glyceric shown 3.8m difference in level as shown diagram. [volume of gas in limb is negligible] [Take R=0.08 atm-lit K^(-1)"mol"^(-1), Density of glyceric=2.72 gm//ml, d_("mercury")=13.6gm//ml]

Answer»

<P>0.81 mole
0.49mole
0.64mole
0.55mole

Solution :`P_("gas")=P_("atm")+[3.8mtxx(d_("glycerine"))/(d_(HG))]`
`=76+76cm=152 cm "of" Hg "or" 2` atm
`n=(PV)/(RT)=(2xx10)/(0.08xx300)=(20)/(24)=0.81` MOL


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