Question

calculate the Gram atoms in 12.8 gram of oxygen.

Answer 1

0.4Na gram
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Answer 2

1 gram atom of O2 = 32 gram

32 gram of O2 = 1 gram atom

1 gram of O2 = 1/32

12.8 gram of O2 = 1/32*12.8

12.8 gram of O2 = 0.4 gram atom