Answer the following questions in the questionnaire. SO3, SeS3, SeO3 1) How many total valence electrons for each compound in your set?
2) How many bonds in each compound in your set?
3) How many lone-pair electrons on the central for each compound in your set?
4) What is the electronic geometry for each compound in
your set?
5) What is the molecular geometry for each compound in your set?
6) Do you see a trend? What is the pattern?

first, consult an activity series chart to determine if al is more reactive than fe. it is, so it will replace the fe. now, one can continue with the problem.

next, make sure you have a correctly balanced equation.

3feo + 2al ==> 3fe + al2o3

now, determine which reactant (feo or al) is in limiting supply.

moles feo present = 125 g x 1 mole/71.8 g = 1.74 moles

moles al present = 25.0 g x 1 mole/26.98 g = 0.927 moles

since from the balanced equation, it take 3 mol feo for every 2 mol al, al will be limiting.

you can determine this simply by dividing moles of each by their coefficient in the balanced equation. for example: 1.74/3 = 0.58 and 0.927/2 = 0.464. al is less, so it is limiting.

finally, using the stoichiometry in the balanced eq. determine mass of fe that can be produced from 0.927 moles of al.

0.927 moles al x 3 moles fe/2 moles al x 55.8 g/mole = 77.6 g

increased stability in the completion of fluorine's outer shell.

thats how its supposed to be

the answer is minerals.