The units of molarity are moles per liter; therefore, in order to compute the molarity, we must first find the moles of potassium perchlorate and the volume in liters: Moles = mass / molecular mass Moles = 18.4 / 138.6 Moles = 0.13 mol
It is more energetically stable to do that. Nature prefers to have a low energy state. If you go somewhere in nature you will usually find a low energy state object or material.
