One mole of CO2 is the sum of all the compound's elements' molar masses (C = 12.01g/mol; O = 16g/mol). That being said, one mole of CO2 is 12.01g + 16g + 16g which is equal to 44.01g. That being said, 10 mol of CO2 is 44.01g • 10 which is 440.1 grams
