We are asked to find the molecular weight of Oxygen.

Molecular weight is simply the weight or **mass of 1 mole of a molecule**. It is **equal*** to the molar mass*

$\overline{){\mathbf{Molecular}}{\mathbf{}}{\mathbf{weight}}{\mathbf{}}{\mathbf{=}}{\mathbf{}}{\mathbf{Molar}}{\mathbf{}}{\mathbf{Mass}}{\mathbf{}}{\mathbf{=}}{\mathbf{}}{\mathbf{atomic}}{\mathbf{}}{\mathbf{mass}}{\mathbf{}}{\mathbf{\times}}{\mathbf{}}{\mathbf{\#}}{\mathbf{}}{\mathbf{of}}{\mathbf{}}{\mathbf{atoms}}{\mathbf{}}{\mathbf{\left(}}{\mathbf{subscript}}{\mathbf{\right)}}{\mathbf{}}{\mathbf{in}}{\mathbf{}}{\mathbf{the}}{\mathbf{}}{\mathbf{molecule}}}$

Recall that **oxygen is diatomic**, which means that **it exists as O**_{2} instead of O. It is **considered a molecule** because it is composed of *2 elemental Oxygens*.

What is the molecular weight of oxygen?