Question

check all that apply: 31.9988 amu is the ____________ of oxygen. formula weight atomic weight molar mass molecular weight

Explanation:

Step1: Recall definitions

The atomic weight of an oxygen - 16 atom is approximately 16 amu. The formula weight is used for ionic compounds, and oxygen is not an ionic compound in this context. The molar mass of a substance has the same numerical value as its molecular or formula weight but with the unit g/mol. The molecular weight of $O_2$ (diatomic oxygen) is approximately 32 amu (more precisely 31.9988 amu).

Answer:

molecular weight