Answer:
To determine the number of moles of solute present in a solution, we can use the formula:
moles of solute = molarity x volume (in liters)
Given that the volume of the solution is 5.0 L and the molarity is 5.0 M, we can calculate the number of moles of solute as:
moles of solute = 5.0 M x 5.0 L
moles of solute = 25 mol
Therefore, there are 25 moles of potassium nitrate (KNO3) present in 5.0 L of a 5.0 M solution.