Question

atomic mass of carbon dioxide

Answer 1

Atomic mass of CO∨2

C = 12 u

O = 16 u

CO∨2 = 12 + 16 × 2
          = 12 +32
         =   44 u

Answer 2

Note:-There is not any atomic mass of a molecule (for eg. CO₂)......There is always molecular mass of molecules......! So your answer is.......!! Molecular Mass of CO₂=Atomic mass of C+Atomic mass of O×2...........! ⇒Molecular Mass of CO₂=12+16×2........!! ⇒Molecular Mass of CO₂=44g