One mole of atoms of oxygen represents

1 mole of an atom of oxygen is $6.02\times {10}^{23}$atoms of oxygen, which is also equal to 16 g and 22.4L of an oxygen atom at STP.

Thus, we can say that by the following basic conversion of a mole into other units, we can easily answer the given question.

1 mole of O = $6.02\times {10}^{23}$of O = 16g of O = 22.4 L of O