1 mole of the molecule contains Avogadro's number (6.022x1023) molecules. For each of these molecules there are 11 oxygen atoms, so in total there are: 11x3.65x6.022x1023 oxygen atoms.
1 mole of the molecule contains Avogadro's number (6.022x1023) molecules. For each of these molecules there are 11 oxygen atoms, so in total there are: 11x3.65x6.022x1023 oxygen atoms.