First we need to determine the number of moles of CO2 present in 4CO2.
The molecular weight of CO2 is 44.01 g/mol. Therefore, the molecular weight of 4CO2 is:
44.01 g/mol x 4 = 176.04 g/mol
We can now use Avogadro's number, which is approximately 6.022 x 10^23 molecules per mole, to convert the number of moles of CO2 to the number of molecules of CO2:
Number of molecules = (Number of moles) x (Avogadro's number)
Number of molecules = (Mass / Molecular weight) x (Avogadro's number)
Number of molecules = (176.04 g / 44.01 g/mol) x (6.022 x 10^23 molecules/mol)
Number of molecules = 16 x (6.022 x 10^23 molecules)
Number of molecules = 9.635 x 10^24 molecules
There are approximately 9.635 x 10^24 molecules in 4CO2.