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Q.

Calculate the density of a gas (molar mass = 64 g mol-1) at 740 mm pressure and 55°C.

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answer is 2.31.

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Detailed Solution

d=?M=64 g mol−1R=0.0821L atm K−1mol−1,P=740mm760mm atm,T= 55+273=328 K. We know that :P=dRTM;d=MPRT  =64gmol−1760×740atm0.0821lit atm K-1 mole-1×328k  ∴       d=2.31 gL-1
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