Final answer:
To calculate the number of moles of CO₂ that contain 2.79 × 10²⁴ molecules, divide the number of molecules by Avogadro's number, which is 6.022 × 10²³.
Step-by-step explanation:
To calculate the number of moles of CO₂ that contain 2.79 × 10²⁴ molecules, you need to use Avogadro's number. Avogadro's number is 6.022 × 10²³, which represents the number of particles in one mole. So, to find the number of moles, divide the number of molecules by Avogadro's number:
Number of moles = Number of molecules / Avogadro's number
Therefore, the calculation is:
Number of moles = (2.79 × 10²⁴) / (6.022 × 10²³) = 4.63 moles of CO₂.