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Question
How many moles of O2 are there in 1.20 × 1022 oxygen molecules ?
Solution
1.20 × 1022 molecules of oxygen
One mole of oxygen contains 6.022 × 1023 molecules.
1.20 × 1022 molecules of oxygen contain = 1.20 × 1022 / 6.022 × 1023 = 0.01099 moles.
Hence, 1.20 × 1022 molecules of oxygen contain 0.0199 moles of oxygen.
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