Activity 2 1/18/11 Molecular Masses

List the molecular masses of carbon dioxide, oxygen, and helium. Explain how you get this from the Periodic Table.

             Carbon dioxide: CO₂   C=12    O=16  O₂=32    12+32=44

                        CO₂ = 44

            Oxygen: O₂        O=16   O₂=32

                        O₂=32

            Helium: He = 4

            Water: H₂O     H=1    H₂= 2       O=16     16+2=18

                        H₂O= 18

    I had to use the atomic mass that is found on the periodic table.