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What does x represent in the formula for the compound xcl4?

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

If an area has high air pressure and low humidity, what type of weather will it most likely have? plz !