Question

if oxygen has an atomic weight of 16, what is the molecular weight of an oxygen molecule?

Explanation:

Step1: Recall oxygen molecule structure

An oxygen molecule ($O_2$) has 2 oxygen atoms.

Step2: Calculate molecular weight

Molecular weight = 2×atomic weight of oxygen. Given atomic weight of oxygen = 16, so molecular weight = 2×16 = 32.

Answer:

A. 32