Saved Help Save Chapteri-Keys to Studying Chemistry 6 Ch. Ex. 30a - Convert Density 5 10 points Be sure to answer all parts. The average density of a planet is 5.17 g/cm'. What is its density in kg/m: (Enter your answer in scientific notation.) eBook * 10 kg/m2 E References so p! w Chapter1-Keys to Studying Chemistry * Saved 9 Ch. Ex. 62a - Significant Figures 10 points Be sure to answer all parts. Enter your answer in scientific notation. Carry out the following calculation, paying special attention to significant figures, rounding, and units (J - joule, the SI unit of energy; mol - mole, the SI unit for amount of substance): eBook (6.626 x 10-94 Js)(2.9979 108 m/s) 2.55 x 10-8 m References x 10 Saved 8 Ch. Ex. 63c - Significant Figures 10 points Be sure to answer all parts. Enter your answer in scientific notation. Carry out the following calculation, paying special attention to significant figures, rounding, and units: eBook (2.55 10 mol/l.) (2.4 x 10 mol/L.) (7.29 x 10 mol/L.)(2.43 * 10-moll)" References x 10 L/mol