Iron reacts slowly with oxygen and water to form a compound commonly called rust (Fe₂O₃ . 4H₂O). Moles of Fe2O3 is 195.01 mol.
There is 1 mole of Fe2O3 in a mole of rust. Thus, the number of moles of Fe2O3 and rust is the same.
Moles of Fe2O3 = 195.01 mol Fe2O3.4H₂O ([tex]\frac{1 mol Fe2O3}{1 mol Fe2O3.4H2O}[/tex])
Moles of Fe2O3 = 195.01 mol Fe2O3
One mole of a chemical is equal to 6.022 x 10²³ molecules (or formula units) (ionic compound). The molar mass of a chemical is the mass of 1 mole of that chemical. To put it another way, it gives you the quantity of grams per mole of a substance.
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