Well one mole of stuff, any stuff, including carbon dioxide, specifies 6.022 × 10 23 individual items of that stuff. Explanation: And thus we work out the quotient: 7.2 × 10 25 ⋅ carbon dioxide molecules 6.022 × 10 23 ⋅ carbon dioxide molecules ⋅ m o l − 1 ≅ 120 ⋅ m o l
carbon dioxide . This is dimensionally consistent, because we get an answer with units 1 m o l − 1 = 1 1 mol = m o l as required.
