the density of an unknown gas at 707 k is 5.518×10^_4 g/ml calculate molecular weight.
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Answer:
Pressure is p=745mm=0.98atm (1 atm = 760 mm Hg)
Temperature is T=65
0
C=65+273=338K
density is d=1.56g/L
P=
M
dRT
where M is molecular wt.
⟹M=
P
dRT
⟹M=
0.98
1.56×338×0.0821
=44.2u
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