Simplest formula?

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11.15g of pure iron are allowed to react with oxygen fo form an oxide, Fe(x)O(y). If the product weighs 14.3g, find the simplest formula of the compound.

2006-10-03 12:44:27 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry

2 answers

1st subtract the starting mass from the end mass to find the mass of the oxygen.
Next convert the grams into moles by dividing by the atomic mass.
Lastly find the simplest whole number ratio bewteen these numbers

2006-10-03 13:26:54 · answer #1 · answered by The Cheminator 5 · 0⤊ 0⤋

11.15g Fe=.2 moles
14.3-11.15=3.15g O = .2 moles O
so the formula is FeO

2006-10-07 10:07:10 · answer #2 · answered by yupchagee 7 · 0⤊ 0⤋