How many grams of water have the same number of oxygen atoms as 1.0 mol of oxygen gas?

As we know 1 mole of O₂ gas contain 6.022 * 10²³ Molecules.

And,

1 mole of O₂ contains 6.022 * 10²³ * 2 Oxygen atoms.

Also,

1 mole of H₂O contains 6.022 * 10²³ Oxygen atoms.

So,

2 moles of H₂O will have 6.022 * 10²³ * 2 Oxygen atoms.

Therefore, we need to take 2 moles of water as 2 moles of water contains exactly the same number of oxygen atoms as that 1 mole of O₂ gas contains.

So,

1 Mole of H₂O = 18 g

Then,

2 Moles of H₂O = X g

Solving for X,

X = (2 mol * 18 g) : 1 mol

X = 36 g H₂O

Result:

36 g of H₂O have the same number of Oxygen Atoms as contained by 1 Mole of O₂ gas.