What is the concentration of 1.8 L KNO3 solution containing 0.5 mol of the solute?

Answer 1

Concentration expressed in molarity (M) is moles / liter

moles = 0.5 mols

Liters of solution = 1.8 L

Concentration (M) = 0.5 mols / 1.8 L = 0.278 M = 0.3 M (2 sig. fig.)