Posted by Anonymous on Thursday, February 5, 2009 at 4:30pm.
1. Write the equation and balance it.
2. Convert 15 L H2S to mols. Remember that 1 mol of a gas at STP will occupy 22.4 L.
3. Using the coefficients in the balanced equation, convert moles H2S to moles iron.
4. Convert moles iron to grams remembering that g = moles x molar mass.
By the way, if you want to write ferrous sulfide using the Stock system (now callled the IUPAC system), you should use Roman numerals as in iron(II) sulfide.
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