Question

the mass of 1 molecule of oxygen o2 in amu and in gram is​

Answer 1

Answer:

O2 is a diatomic molecule. The mass of an oxygen atom = 16 amu. ∴ Mass of O2 molecule = 2 × 16 = 32 amu

Answer 2

Answer:

32 AMU or 32 g

Explanation:

The atomic number of oxygen(O2) is 8. So there is a trick which works for 90% of the elements:

Trick: If the atomic number of the element is even. Then the mass no. will be double the atomic number. If the atomic no. is odd, then the mass no. will be double the atomic no. + 1.

So O2's atomic no. is 8.

Double of 8 is 16.

HENCE, MASS OF Oxygen atom is 16 amu or 16g.

Therefore mass of O2 molecule= 2 x 16=32 amu or 32 g.