The correct answer is 0.025.Concept:Mole:It is the SI unit of the amount of substance.One mole contains exactly 6.022 À” 1023 atoms/molecules. This number is the fixed numerical value of the Avogadro constant (NA).The mass of one mole of a substance in grams is called its molar mass.The molar mass in grams is numerically equal to atomic/molecular/formula mass in u.So, 1 mole = 6.022 À” 1023 atoms/molecules = Atomic/molecular mass of an element/compound.Explanation:1 mole = 6.022 À” 1023 molecules? 6.022 À” 1023 molecules of carbon dioxide = 1 mole of carbon dioxide ? 1 molecule = 1/ 6.022 À” 1023 moles of carbon dioxide ? 1.501 À” 1022 molecules = 1.501 À” 1022 / 6.022 À” 1023 moles of carbon dioxide = 0.025 moles of carbon dioxide