How many moles of iron are in 0.067 gram sample of iron oxide? Chemistry The Mole Concept The Mole 1 Answer anor277 Jan 26, 2017 Well if its #"ferric oxide"#.......... Explanation: #"Ferric oxide"#, #Fe_2O_3#, has a molar mass of #159.69*g*mol^-1#. #"Moles of ferric oxide"=(0.067*g)/(159.69*g*mol^-1)=4.20xx10^-4mol#. Of course it could be #"ferrous oxide"#, #FeO#, or another iron oxide, so I don't think that this question was well-proposed. Answer link Related questions How do you calculate the number of moles from volume? How do you convert grams to mole? Question #258e5 Question #8d48c Why is the mole an important unit to chemists? What's the mole number? How does the mole relate to carbon 12? How does the mole relate to molecules and ions? How do you calculate the moles of a substance? How can I calculate the moles of a solute? See all questions in The Mole Impact of this question 3126 views around the world You can reuse this answer Creative Commons License