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What's the ratio in the compound iron(II) sulfide?

User Tan Sang
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To determine the ratio of atoms present in this ionic compound, first write the charges of the ions, and swap the charges to determine the subscripts of the atoms.

Fe^+2 S^-2
FeS.

This refers to the ratio as 1 Fe ion for 1 S ion.
User Safakeskin
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