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Ananya Shree

Class 11th
Physics
2 years ago

Estimate the fraction of molecular volume to the actual volume occupied by oxygen gas at STP. Take the diameter of an oxygen molecule to be 3 Å.

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Muskan Anand

2 years ago

Diameter (size) of oxygen molecule =3A˚ Radius of oxygen molecule, r=23​A˚=1.5×10−10m Therefore, volume of 1 mole of oxygen gas at S.T.P    =34​πr3×N    =34​×π×(1.5×10−10)3×6.0225×1023    =8.514×10−6m3=8.514×10−3 litre Fraction of the molecular volume occupied =22.48.514×10−3​=3.8×10−4

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