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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 3Å.
Asked by Rayaan Last Modified
Answer 
Harshit Bhardwaj
Diameter of an oxygen molecule, d = 3Å
Radius, r 
= 1.5 Å = 1.5 × 10–8 cm
Actual volume occupied by 1 mole of oxygen gas at STP = 22400 cm3
Molecular volume of oxygen gas,
Where, N is Avogadro’s number = 6.023 × 1023 molecules/mole
Ratio of the molecular volume to the actual volume of oxygen 
= 3.8 × 10–4
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