What determinds the ratio of ions in an ionic compound?

How manyatoms of mercury are in 1.4214e+1 ml sample

You are making a solution of calcium chloride dissolved in water. you add solid, stir, and it dissolves. you add just a spatula tip full, stir, and the solid does not dissolve. how could you describe the solutions before and after adding the spatula tip amount

Define the kinetic molecular theory