Tried to verify it.

Number of atoms is measured in mole. And atoms in one mole of any material is equal to Avogadro's number. But the weight of 1 mole varies from material to material.

Figured out:

1 mole for water = 18 gms.

1 glass of water = 240 gms.

Volume of water in all the oceans = 1 trillion cubic km.

Avogadro's number = 6e23

Therefore:

Number of atoms in a glass of water = 1e25

Glasses of water in all the oceans = 5e21

Number of atoms in a glass is 1000 times higher than glasses of water in all the oceans.

- Comments:
- :-P (Y)