What is the molarity of 0.65 mol NaF dissolved in a total volume of 0.50 liters?

1.3 M

Explanation:

The question asks to calculate the molarity of a solution.

We have to use the following equitation:

Molarity = # moles / 1 lt of solution

In this case we have a solution composed of 0.65 mol of NaF diluted in a total volume of 0.5 lt. We will have to do the following cross multiplication solving for x:

0.65 mol NaF / 0.5 lt = x mol NaF / 1 lt

x = 1.3 mol NaF / 1 lt = 1.3 M