Which of these best explains why the hydrogen atoms in a water molecule are attracted to cl− ions in sodium chloride (nacl)?

a. the hydrogen atoms have +1 charges.
b. the hydrogen atoms share electrons equally with the oxygen atom.
c. the hydrogen atoms have partial positive charges.
d. the hydrogen atoms form covalent bonds with the chloride ions.

C. The hydrogen atoms have partial positive charges.

Explanation: The solubility of substances is governed by: Like dissolves like, which states that polar compounds are soluble in polar solvents and non polar compounds are soluble in non polar solvents.

Water being polar in nature dissolves by getting between the oppositely charged ions of solute and thus decreasing the forces of attraction between the ions. The positively charged ions are attracted to positive pole of water which is hydrogen and the negatively charged is attracted to negative pole of water which is oxygen.

distance, luminosity, brightness, radius, chemical composition, and temperature

the answer is:  

line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).