Homework Help: Chemistry*

Posted by Anonymous on Sunday, April 25, 2010 at 6:15pm.

Oh sorry I forgot the arrows!

Over the years, the thermite reaction has been used for welding railroad rails, in incendiary bombs, and to ignite solid-fuel rocket motors. The reaction is given below.

Fe2O3(s) + 2 Al(s) -->2 Fe(l) + Al2O3(s)

What masses of iron(III) oxide and aluminum must be used to produce 30.0 g iron? What is the maximum mass of aluminum oxide that could be produced?

Chemistry* - DrBob222, Sunday, April 25, 2010 at 6:18pm
1. Convert 30 g Fe to moles. moles = grams/molar mass.
2. Using the coefficients in the balanced equation, convert moles Fe to moles Fe2O3.
3. Now convert moles Fe2O3 to grams. g = moles x molar mass.

4. Same process to determine g Al needed.
Post your work if you get stuck.
Chemistry* - Anonymous, Sunday, April 25, 2010 at 8:10pm
Ohh okay THANK YOU so much drbob222!

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