How many moles of KCl are dissolved in 1.20 L of a 0.400 M KCl solution?

To calculate the amount of moles of potassium chloride in a 0.400 M KCl (aq) solution, you may use equation (1) below

n = c * v (1)

where n equals the amount of moles, c is the concentration of the solution and v is the volume.

We have the volume and the concentration, which renders us able to solve the equation:

n = 0.400 * 1.2 L

n = 0.48 moles.