Calculate
(a) the mass of one atom of oxygen
(b) the mass of one molecule of oxygen
(c) the mass of one mole of oxygen gas
(d) the mass of one ion of oxygen
(e) the number of atoms in 1 mole of oxygen molecule

(a) Mass of one atom of oxygen

   1 mole of  oxygen atom = 16 gm = 6.022 x 10²³

Therefore, Mass of one atom of oxygen = 16/6.022x 10²³=  2.65 x 10^-23

(b) Mass of one mole of oxygen =

  1 molecule of oxygen =O₂

                                           = 2 x 16

                                             = 32 u

(c) Mass of one mole of oxygen gas

          1 mole of oxygen gas is O₂ =- 32 u

(d) Mass of one ion of oxygen 

One mole of oxygen = 6.022x 10²³ atoms = 16g

Mass of one ion of  oxygen  =16/6.022x10²³= 2.65x10^-23

(e) Number of atoms in one mole of oxygen molecule

1 mole of oxygen molecule . i.e, 

O₂=6.022 x1023 molecule

1 molecule of O₂ = 2 atoms.
 

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Updated on: 14-Mar-2023

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