What tells the mole ratio of the reactants and products in the chemical equation?

Who is better, messi or cristiano, i need this for a chemistry class. asap

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 element is the least metallic between cadmium, silver, zinc, or iron?