Naturally occurring oxygen is composed of 99757 of 16o, Ask an Expert

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Naturally occurring oxygen is composed of 99.757% of 16O (atomic mass, 15.9949 u), 0.038% of 17O (atomic mass, 16.9991 u), and 0.205% of 18O (atomic mass, 17.9992 u). Use these data to calculate the average atomic mass of oxygen. Report your answer with two decimal places.

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