# chemistry

Consider the following reaction.
4Fe + 3O2 2Fe2O3

a. How many moles of O2 are required to react completely with 46.7 mg of Fe?

How many grams Fe2O3, are produced from the complete reaction of 20.1 g of Fe?

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1. You need to find the arrow key.
4Fe + 3O2 ==> 2Fe2O3
a.
mols Fe = grams/atomic mass = ?
Using the coefficients in the balanced equation, convert mols Fe to mols O2.

b.
mols Fe = grams/atomic mass = ?
Using the coefficients in the balanced equation convert mols Fe to mols Fe2O3.
Then convert mols Fe2O3 to grma. g = mols x molar mass = ?

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