Which of the following represents the mass of an oxygen molecule?

A:16.0g

B:16.0x2g

C:16.0/6.02x10^23 g

D:16.0x2/6.02x10^23 g

The answer is D. An oxygen molecule, O2 (because oxygen's natural state is diatomic), consists of two oxygen atoms. You would calculate the mass of a mole of oxygen molecules as 16.00 * 2 grams. To find the mass of one molecule, use the conversion factor 1 mole / 6.02e23 molecules. The mass of one oxygen molecule would then be 16.00 * 2 / 6.02e23