/mL. A student is holding two 2 Assume the density of air at room temperature is 1.2 ml. A student is hol balloons filled with gases; one balloon filled with hydrogen gas (dens ses: one balloon filled with hydrogen gas (density -0.082 g/mL) and second balloon filled with carbon dioxide gas (density = 1,9 / would happen if the student release both the balloons? 3. A data set is recorded to find the density and identity of a spherical piece of an unknown metal. Complete the table. Show all your work and include appropriate units. Density measurement of a spherical piece of unknown metal Mass of the metal piece 35.65 g Diameter of the spherical metal piece 1.85 cm Radius of the spherical metal piece Volume of the metal piece Density of the metal piece Identity of the metal piece (Hint: use your reference table 1 given in the procedure) Calculate the percentage (%) error in density value of metal piece