How many moles of feo are produced of 8 moles of so2 are produced?

8

Explanation: looking at the stoichiometry, there is a 1:1 mole ratio between moles of CuFeS2 consumed and moles of FeO produced. So, based on the above reaction, 8 moles of CuFeS2 would produce 8 moles of FeO.

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explanation:

it forms an anion that has a larger radius. anions have a negative charge and are larger than the original atom.