Answer:
Step-by-step explanation:
Convert
Iron(III) carbonate ====> iron(III) oxide + carbon dioxide
I take it you want this balanced.
First you have to put this into periodic table information,
Fe(iii) 2 (CO3)3 ====> Fe(iii)2O3 + CO2
Let's see what's wrong. The left side has 3 Carbons and 9 0xygens. It is up to the CO2 to put this in balance. Any time you touch either the Fe(iii)2(CO3)3 or Fe(iii)2O3 then you have to give the other one the same balance number, other wise the Fe(iii)s will not be balanced. So all you can hope for is to use CO2 to bring things into balance.
Answer
Fe(iii) 2 (CO3)3 ====> Fe(iii)2O3 + 3CO2
That should do it. There are 3 carbons on the left and right, and 9 Oxygens on both sides.