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The total number of molecules contained in 0.5 mole of O₂ is 3.0×10²³ molecules
From Avogadro's hypothesis,
1 mole of O₂ = 6.02×10²³ molecules
With the above information in mind, we can obtain the number of molecules in 0.5 mole of O₂ as illustrated below:
1 mole of O₂ = 6.02×10²³ molecules
Therefore,
0.5 mole of O₂ = 0.5 × 6.02×10²³
0.5 mole of O₂ ≈ 3.0×10²³ molecules
Thus, 3.0×10²³ molecules is present in 0.5 mole of O₂.
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