You found that naphthalene is more soluble in petroleum ether than water. how do you account for this difference in solubility?

Naphthalene is a nonpolar molecule, therefore it is more soluble in the nonpolar solvent, petroleum ether, than the polar solvent, water. 

The general solubility principle is that "like dissolves like." Naphthalene is a nonpolar hydrocarbon, which means that it has no unequal distribution of charges within its molecular structure, giving it no partially charged regions. Petroleum ether is a nonpolar hydrocarbon also, and thus, since they are both alike in "nature" (nonpolar), then naphthalene will dissolve in the petroleum ether solvent. 

On the other hand, water is a polar molecule, which means that there is an unequal distribution of charge within the molecular structure, giving it a partial positive and a partial negative region. Being polar, it is unlike naphthalene in nature and will therefore not dissolve the said solute. 

Maybe you should get some from your teacher and learn more so you can get your grades up and maybe study a bit more

Product should she record in last row of the table

rosa was looking for patterns to predict the products of chemical reactions. she recorded three similar decomposition reactions in the table.she should record 2licl + 3o2.

in the last row of the table. it is the thermal decomposition of chlorate lithium, hence, she should record these products as: lithium chloride ( 2licl ) and oxygen ( 3o2 )   2 > 2 licl + 3o2.