Answer:
a. 4.15x10⁻⁴moles Fe
Explanation:
1 mole of a substance is defined as 6.022x10²³ particles of this substance. That means:
1mol of electrons = 6.022x10²³electrons
1mol of atoms = 6.022x10²³atoms
1 mol of molecules = 6.022x10²³ molecules
And 1mol of atoms of Fe = 6.022x10²³ atoms of Fe
That means 2.50x10²⁰ atoms of Fe
2.50x10²⁰ atoms Fe * (1 mole of Fe / 6.022x10²³ atoms) =
4.15x10⁻⁴ moles of Fe
Right answer is:
a. 4.15x10⁻⁴moles Fe
