What is a double bond?

If 10.g of agno3 is available, what volume of 0.25 m agno3 can be prepared

Why does a red shoe appear red in daylight

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