One mole of a substance is equal to 6.022 x 10^23 molecules. Therefore, to find the number of molecules in 41.5 moles of CO₂, we can multiply the number of moles by the conversion factor:
41.5 moles CO₂ * 6.022 x 10^23 molecules/mole = 248,839,500,000,000,000 molecules CO₂
So there are approximately 248,839,500,000,000,000 molecules of CO₂ in 41.5 moles of CO₂.