Water's unique properties allow it to-

a.dissolve aqueous solutions
b.dissolve ionic and nonpolar covalent molecules
c.dissolve ionic and polar covalent molecules
d.dissolve ionic, covalent and metallic molecules

is it c, because i know water is polar?

c is correct.

Yes, your answer is correct. Water is a polar molecule, meaning it has a partial positive charge on one side (hydrogen atoms) and a partial negative charge on the other (oxygen atom). This polarity allows water molecules to interact with other polar molecules and ions.

Specifically, water can dissolve ionic compounds because the positive and negative ends of water molecules can attract the positive and negative ions present in the compound, breaking them apart and forming a solution. Water can also dissolve polar covalent molecules, which are composed of polar bonds. The partial charges of water can interact with the partial charges of the polar molecules, causing them to dissociate and dissolve in water.

However, water cannot dissolve nonpolar covalent molecules because they do not have an imbalance of charges and are therefore not attracted to the polar water molecules. Nonpolar substances, like oil or fats, are typically hydrophobic (water-fearing) and do not mix with water.

So, the correct answer is (c) dissolve ionic and polar covalent molecules.