Answer:
The diagram provided shows K2O, or potassium oxide.
Explanation:
Ok... so, there are two "K2O" options, so I would just choose either and hope for the best. I don't know, maybe it's a mistake...
Chloromethane has a boiling point of -11.56°F
Oxygen has a boiling point of -297.3°F
<u>Sodium chloride has a boiling point of 2,669°F</u>
Isopropyl alcohol has a boiling point of 180.5°F
<u><em>So sodium chloride has the highest boiling point.</em></u>
