How many moles aluminum oxide can be produced from 6.9 moles of aluminum in the following reaction? Al + 3 FeO  Al2O3 + 3 Fe

Question

Can you please explain how you got the answer, thank you

Answer 1

2Al + 3FeO ==> Al₂O₃ + 3Fe ... balanced equation

To get the answer, you want to look at the balanced equation and note that 2 moles of aluminum (Al) can produce 1 mole of aluminum oxide (Al₂O₃). That's the critical relationship that exists. Using dimensional analysis, we can easily find the moles of Al₂O₃ that can be formed from 6.9 moles of Al.

6.9 moles Al x 1 mole Al₂O₃/2 moles Al = 3.45 moles = 3.5 moles Al₂O₃ formed.