Please help with a chemistry project that is not difficult and unique as well. ;-;

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

Which of the following are sources of revenue for media companies? a. direct sales to producers b. advertising and subscriptions c. online purchase d. capital investments

#20 which type of bond is formed when bases pair in dna? ionic bond covalent bond coordinate bond hydrogen bond