Question

an organic iron compound consisting of Fe, C, H, and O was found to contain 51.043%C, 5.9886%H, 27.17%O, and 15.80%Fe. how many moles of each element are in 100g of the compound
In 100 g sample you will have guess what?
51.043 g C
5.9886 g H
27.17 g O
etc.
Now remember that moles = grams/molar mass.

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