Please help me with this chem question!!

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

The arrangement of particles is most ordered in a sample of

How many moles are contained in 5.6 l of h2 at stp