Oxygen has a total of three isotopes Oxygen-16, Oxygen-17, and oxygen-18. With their a.m.u. being 15.995, 16.999, and 17.999 res

Question

4 years ago

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pectively. The percent abundance for Oxygen-17 is 0.04% and Oxygen-18 is 0.2%. Find the percent abundance for oxygen-16?

1 answer:

Inessa05 [86] · Answer 1 · 2022-01-07T02:17:46+03:00

<u>Answer:</u> The percentage abundance of oxygen-16 isotope is 99.76 %

<u>Explanation:</u>

We are given:

Three isotopes of oxygen are there, O-16, O-17 and O-18

Mass of Oxygen-16 isotope = 15.995 amu

Mass of Oxygen-17 isotope = 16.999 amu

Mass of Oxygen-18 isotope = 17.999 amu

Percentage abundance of Oxygen-17 isotope = 0.04 %

Percentage abundance of Oxygen-18 isotope = 0.2 %

We know that:

Percentage abundance of all isotopes together is 100 %

So, Percentage abundance of Oxygen-16 isotope = [100 - (0.04 + 0.2)] = 99.76 %

Hence, the percentage abundance of oxygen-16 isotope is 99.76 %