What mass of NaCl is in 1.20L of 0.414M solution?

29.03 grams

Explanation:

All you need to know here is that the molarity of a solution tells you the number of moles of solute present in exactly 1 L of the solution.

In your case, a 0.414-M sodium chloride solution will contain 0.414 moles of sodium chloride, the solute, for every 1 L of the solution.

So if every 1 L of this solution must contain 0.414molesof sodium chloride in order for the solution to have a molarity of 0.414 M, it means that 1.20L of this solution must contain