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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 0.0200% respectively. What is the average atomic mass of oxygen?

A

15.999 u

B

16.999 u

C

17.999 u

D

18.999 u

Text Solution

Verified by Experts

The correct Answer is:
A
Average atomic mass of oxygen
`=((99.763xx15.995)+(0.037xx16.999)+(0.200xx17.999))/(100)`
=15.999 u
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Knowledge Check

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