Question

question 8 oxygen diatomic is a form of elemental oxygen. question 9 in units of mole ex the mass of one gram of an element.

Explanation:

Oxygen in its diatomic form is represented as O₂. H₂O is water, NH₃ is ammonia, and CO₂ is carbon - dioxide, none of which are elemental oxygen. Elemental oxygen in the diatomic state is O₂.

Answer:

O2