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van der waals b for oxygen is 32 cm^3/mol.compute diameter of an o2 molecule?
b=4V m =32cm 3 /molV m =8cm 3 /mol For one molecule, V= 6.023×10 23 molecules/mol8cm 3 /mol V=1.33×10 −23 cm 3 /moleculeBut V= 34 πr 3 34 πr 3 =1.33×10 −23 cm 3 /moleculer 3 =3.17×10 −24 cm 3 /moleculer=1.47×10 −8 cmThe diameter of an O 2 molecule =2r=2×1.47×10 −8 cm=2.94×10 −8 cm
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