Final answer:
To find the moles of iron in 50.0g, divide the given mass by the molar mass. To find the number of iron atoms, multiply the moles by Avogadro's number.
Step-by-step explanation:
To determine the number of moles of iron in 50.0g of iron, we need to divide the given mass by the molar mass of iron. The molar mass of iron is 55.8 g/mol. So, dividing 50.0g by 55.8 g/mol, we get approximately 0.895 moles of iron.
To calculate the number of iron atoms in 50.0g of iron, we need to use Avogadro's number, which is 6.022 × 10^23 atoms/mol. Multiplying the number of moles of iron (0.895 moles) by Avogadro's number, we get approximately 5.4 × 10^23 iron atoms.