To calculate the number of moles of CO2 in 454 grams, we need to know the molar mass of CO2. The molar mass of CO2 is 44.01 g/mol, which means that each mole of CO2 weighs 44.01 grams.

Using the molar mass, we can calculate the number of moles of CO2 in 454 grams:

$$ 454 \text{ g CO2} \times \frac{1 \text{ mol CO2}}{44.01 \text{ g CO2}}$$

$$= 10.32 \text{ mol CO2 }$$

Therefore, there are 10.32 moles of CO2 in 454 grams.