A sample of 5.01 g of solid calcium hydroxide is added to 39.5 mL of 0.430 M aqueous hydrochloric acid. Write the balanced chemical equation for the reaction. Physical states are optional.

A4.86 g piece of metal was placed in a graduated cylinder containing 15.5 ml of water. the water level rose to 17.3 ml. what is the density of the metal. i need the steps of how to solve it to so i can use a formula to work out other problems.