Question: how many moles of carbon atoms are in one mole of carbon dioxide?
Answer: Avogadro's number shows us that there are 6.022 x 10^23 molecules of CO2 in 1 mole of the gas. Therefore, there are 6.022 x 10^23 atoms of carbon and 12.044 x 10^23 atoms of oxygen in that 1 mole of CO2.