Question

Atomic weight of O2...​

Answer 1

Atomic weight of O2 is 15.999 u

The atomic weight of any atom can be found by multiplying the abundance of an isotope of an element by the atomic mass of the element and then adding the results together.

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Answer 2

Answer:

Atomic weight of O2 is 15.999 u.

The atomic mass is the mass of an atom. Although the SI unit of mass is the kilogram, atomic mass is often expressed in the non-SI unit atomic mass unit or unified mass or dalton, where 1 amu or 1 u or 1 Da is defined as 1⁄12 of the mass of a single carbon-12 atom, at rest.

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