A gas jar contains 12.04*10^23 molecules of oxygen. The mass of oxygen in the jar is
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Explanation:
No. of moles of O2= 12.04×10^23 molecules/NA(6.02×10^23)
=2 moles
Mass of O2 in its one mole=32g
2 moles of O2 make 2×32g of O2 or 64g of O2....
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