1. (10 points) An irregularly shaped piece of metal is weighed on a balance, as is found to be 20.97g. The metal piece is then placed into a graduated cylinder filled with distilled water. The initial volume of the water in the graduated cylinder is 30.7 ml. The final volume, with the metal piece submerged in the water, is 32.3 ml. Calculate the density of the metal, to the correct number of significant figures. 2. (15 points) Calculate the wavelength (in nm) of the emission line in the H-atom spectrum corresponding to the n = 4 to n = 3 transition. What region of the electromagnetic spectrum does this emission line belong in?