If 39.7 g of CS2 are produced in the lab, what is the percent yield for this reaction?

The answer is b because c don't explain why the moths are on them and it isn't a because as we know only one species of moth does this

The correct answer to this question is 28 

Sink to the bottom. addition of potassium nitrate past it’s dissolution capacity at a particular temperature will cause the extra to just sink to the bottom of the glass.however, if you were to raise the temperature of the solution prior to dissolving it, and then slowly decrease the temperature after the dissolution, you would create a “supersaturated” solution - a solution that has more solute dissolved into it than should be allowed. if you add any extra solute past this, the entire solution would “crystallize,” and this is how you get those cool videos on youtube.