Moles and the Chemical Formula One molecule of ozone, O3, contains three oxygen atoms. Similarly, 1 mole of ozone contains 3 moles of oxygen atoms. We can use this mole ratio to create two conversion factors: 3 moles O/1 mole O3 and 1 mole O3/3 moles O Here's how to find the number of moles of oxygen atoms in 2 moles of ozone: 2 moles O3 X 3 moles/ 1 mole O3 = 6 moles O Calculate the number of moles of aluminum, sulfur, and oxygen atoms in 9.00moles of aluminum sulfate, Al2 (SO4)3. Express the number of moles of Al, S, and O atoms numerically, separated by commas. moles of Al, S, O =Part B Calculate the number of moles of magnesium, chlorine, and oxygen atoms in 2.80moles of magnesium perchlorate, Mg(ClO4 )2. Express the number of moles of Mg, Cl, and O atoms numerically, separated by commas. moles of Mg, CI, O =Part C A sample of propane, C3H8. contains 15.0moles of carbon atoms. How many total moles of atoms does the sample contain? Express the total number of moles of carbon and hydrogen numerically.