Suppose that 1 mole would have not been equal to 6.023*10^23 and would have been equal to 10^20 , then what would have been the molecular weight og oxygen gas? pls answer fast. . .

It would remain the same, because the molecular weight of any substance is the ratio of the mass of that molecule to 1/12 of the mass of carbon-12.
The mass of C-12 depends on the no. of protons and neutrons hence is not affected by Avogadro's no.

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