I think the correct answer from the choices listed above is option A. It is NaCl the formula that represents an ionic compound. An ionic compound is held my oppositely charged atoms. Therefore, this would mean that one is a positive and another is a negative held together. NaCl is held by these forces.
The given question is incomplete. The complete question is:
A chemist prepares a solution of barium chloride by measuring out 110 g of barium chloride into a 440 ml volumetric flask and filling the flask to the mark with water. Calculate the concentration in mole per liter of the chemist's barium chloride solution. Round your answer to 3 significant digits.
Answer: Concentration of the chemist's barium chloride solution is 1.20 mol/L
Explanation:
Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

where,
n = moles of solute
= volume of solution in L
moles of
(solute) = 
Now put all the given values in the formula of molality, we get

Therefore, the molarity of solution is 1.20 mol/L
Answer:
Map scale refers to the relationship (or ratio) between distance on a map and the corresponding distance on the ground.
Explanation:
For example, on a 1:100000 scale map, 1cm on the map equals 1km on the ground.