Final answer:
To find the number of atoms of iron in each sample, multiply the number of moles by Avogadro's number. a) Wolframite: 2.6536 x 10^48 atoms, b) Pyrite: 9.9905 x 10^47 atoms, c) Magnetite: 1.2562 x 10^48 atoms, d) Hematite: 1.1139 x 10^48 atoms.
Step-by-step explanation:
To determine the number of atoms of iron in each sample, we need to use Avogadro's number, which is approximately 6.022 x 10^23 atoms per mole. First, we convert the given number of moles to atoms by multiplying it by Avogadro's number.
a) Wolframite: 4.41 x 10^24 moles x 6.022 x 10^23 atoms/mole = 2.6536 x 10^48 atoms of iron
b) Pyrite: 1.66 x 10^24 moles x 6.022 x 10^23 atoms/mole = 9.9905 x 10^47 atoms of iron
c) Magnetite: 2.09 x 10^24 moles x 6.022 x 10^23 atoms/mole = 1.2562 x 10^48 atoms of iron
d) Hematite: 1.85 x 10^24 moles x 6.022 x 10^23 atoms/mole = 1.1139 x 10^48 atoms of iron