- Since 1 mole of CO2 is 44 g... and you have 1/2 of a mole, you have one half the number of molecules in one mole; 6.02 x 10^23/ 2. Since there is only 1 carbon atom in each molecule, this is your answer. thus 22gm CO2 has 3.011x10^23 C atoms.
- A mole is 6.022 times 10 to the 23rd power. There are two atoms of oxygen in every carbon dioxide molecule, and there are 3 moles of carbon dioxide; therefore there are 3.6132 times 10 to the 24th power atoms of oxygen in 3 moles of pure carbon dioxide.