How many molecules of O2 are in 8.0 g of oxygen? If the O2 molecules were completely split into O (Oxygen atoms), how many mole of atoms of oxygen would be obtained?
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32 g contains → 6.022 × 1023 molecules of di oxygen. 1 g contains → 6.022 × 1023 / 32 molecules of di oxygen. ⇒ 1 g contains → 0.188 × 1023 molecules of di oxygen. ∴ 8 g contains → 0.188 × 8 × 1023 molecules of di oxygen
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