Oxygen occurs in nature as a mixture of ...

Oxygen occurs in nature as a mixture of isotopes `""^16O, ""^17O " and " ""^18O` having masses of 15.995 u, 16.999 u and 17.999 u and relative abundance of 99.763%, 0.037% and 0.200% respectively. What is the average atomic mass of oxygen?

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The correct Answer is:

16.004

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