To calculate the mass of 125 iron atoms, we need to know the atomic mass of iron and convert it into grams. The atomic mass of iron (Fe) is approximately 55.845 atomic mass units (AMU).
Now, we can calculate the mass as follows:
Calculate the molar mass of iron: Molar mass of iron = 55.845 g/mol
Calculate the mass of one iron atom: Mass of one iron atom = Molar mass of iron / Avogadro's number
Avogadro's number is approximately 6.022 x 10^23 atoms/mol.
Mass of one iron atom = 55.845 g/mol / (6.022 x 10^23 atoms/mol)
Calculate the mass of 125 iron atoms: Mass of 125 iron atoms = Mass of one iron atom x 125
Therefore, the mass in grams of 125 iron atoms is approximately: Mass of 125 iron atoms = (55.845 g/mol / (6.022 x 10^23 atoms/mol)) x 125