Chemistry Forum

Thank you for your answer, but I have no idea, that's why I posted the question here. :D I'm trying to help somebody understand this, because this was a question in a quiz, but this type of problem hadn't been seen in class. I studied Chemistry in high school 4o years ago to this day, didn't like it...

I need help with this problem. This was a quiz for 9th grade Chemistry Honors. I'm totally confused. Can anybody answer it? I posted it in another website and I haven't gotten a reply yet. Thank you in advance! 3 MgO + 2 Fe --> 3 Mg + Fe2O3 DeltaHrxn= -47,524 kJ/molrxn The reaction above is utilized...