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Posted by on Thursday, June 21, 2012 at 11:09am.

Iron (III) oxide is formed when iron combines with oxygen in the air. How many grams of Fe2O3 are formed when 16.7 g of Fe reacts completely with oxygen?
a. 12.0g
b. 23.9g
c. 47.8g
d. 95.6g

  • Chemistry - , Thursday, June 21, 2012 at 7:02pm

    Write the equation and balance it.
    Convert 16.7 g Fe to mols. mol = grams/molar mass
    Use the coerfficients in the balanced equation to convert mols Fe to mols Fe2O3.
    Now convert mols Fe2O3 to grams. g = mols x molar mass.

  • Chemistry - , Thursday, February 25, 2016 at 11:21pm


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