1. Mass of Standard Mass on Analytical Balance I.D. Nurnber Experimental Mass (9) Theoretical Mass (9) % Error A 19.9978 'g 10.0000, 0.0229 2. Mass of Penny Balance Mass (9) Number of Significant Figures Number of Certain Digits Number of Uncertain Digits Uncertainty (+/-) 9 Decigram 2-59 contgram 2.5ly 3. Density of a Metallic Object Type of Object: Diameter: 2.0(cm) Radius: Volume: (cm) (cm) Height: 5. O.(cm) Mass: 5.6 (9) Experimental Density: (g/cm) Theoretical Density: 2-7 (g/cm") % % Error (show your work)