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5 September, 20:00

How many moles of Oxygen atoms do you have when you have 1.20 x {10}^{25} N2O5 molecules?

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  1. 5 September, 20:49
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    100 moles of Oxygen

    Explanation:

    We are given;

    1.20 x 10^25 molecules of N₂O₅

    We are required to determine the number of moles of Oxygen in 1.20 x 10^25 molecules of N₂O₅.

    We know that;

    1 mole of N₂O₅ contains 6.022 x 10^23 molecules of N₂O₅ Therefore, we can determine the number of moles of N₂O₅ containing 1.20 x 10^25 molecules of N₂O₅.

    Moles = Number of molecules : Avogadro's number

    = 1.20 x 10^25 molecules : 6.022 x 10^23 molecules/mole

    = 19.9 moles

    = 20 moles

    But, 1 mole of N₂O₅ contains 5 moles of Oxygen

    Therefore;

    20 moles of N₂O₅ will have;

    = 20 moles * 5

    = 100 moles

    Therefore, 1.20 x 10^25 molecules of N₂O₅ contains 100 moles of oxygen.
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