Answer
Oxygen 16
99.76% / 100% = 0.9976
16 x 0.9976 = 15.9616
Oxygen 17
0.037% / 100% = 0.0037
17 x 0.037 = 0.00629
Oxygen 18
0.204% / 100% = 0.00204
0.00204 x 18 = 0.03672
Total = 16004
Work Step by Step
As given in answer