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One mole of oxygen gas at STP is equal to
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\(6.022 \times 10^{23}\) molecules of oxygen
I mole of \(\mathrm{O}_2(g)\) at STP contains Avogadro number \(\left(N_A=6.022 \times 10^{23} \mathrm{~mol}^{-1}\right)\) of \(\mathrm{O}_2\) molecules, which will occupy its molar volume, i.e, 22.4 L.
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