Answer:
Atomic mass O is 15.9994.
Molar mass of O2 =2 X 15.9994=31.99880 g/mole.
10 g X 1 mole/31.99880 g X 6.022 X 10^23 atoms/mole =
188194557295898596197357 atoms in 10 grams O2.
Explanation:
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