How many moles of iron (lll) nitrate are in 200 grams of iron (Ill) nitrate? Chemistry The Mole Concept The Mole 1 Answer anor277 May 22, 2016 #"Number of moles"# #=# #"Mass"/"Molar mass"# Explanation: #n = (200*g)/(241.86*g*mol^-1)# #~=# #0.80*mol# #Fe(NO_3)_3#. How many moles of #O#, and #N# does the given mass represent? 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 1993 views around the world You can reuse this answer Creative Commons License