Why natural products and secoundary metabolism so widely variable in plant kingdom?​

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

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

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?