Explain the differences in the solubilities of the gases in the table by completing the following sentences.

1. Compared to oxygen, nitrogen's makes it more difficult for water molecules to the surround nitrogen molecules. 
2. The high solubility of sulfur dioxide can be explained by its . 
3. Nitric oxide is more soluble than nitrogen and oxygen because of its . 
4. Compared to nitrogen, the of ethylene makes it more soluble in water. 

CHOICES are: 
a. shorter bond length 
b. ability to react with water 
c. larger molecular size 
d. polarity

answers: a, b, d, c.

Most smaller stars don't have a radiative zone.