Suppose you have two samples that are equal in weight, 23.8 g Zn and 23.8 g Fe2O3 . Calculate the number of moles of each substance.

Answer 1

Moles of Zn = 23.8 g Zn x 1 mole Zn/65.4 g = 0.364 moles Zn

Moles of Fe₂O₃ = 23.8 g Fe₂O₃ x 1 mole Fe₂O₃/160 g = 0.149 moles Fe₂O₃