How many moles of oxygen atoms do you have when you have 1.20 x {10}^{25} n2o5 molecules?

100 moles of Oxygen

We are given;

1.20 x 10^25 molecules of N₂O₅

We know that;

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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/ˈplājəˌrizəm/

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noun

the practice of taking someone else's work or ideas and passing them off as one's own.

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