In the reaction of aluminum and iron(iii) oxide to form iron and aluminum oxide, δh is - 850 kj. how many grams of aluminum oxide are formed when 350 kj of heat are released?

The  grams  of   aluminium  oxide  are  formed when  350  kj  heat  are  released is calculated  as  follows

1mole  =  850Kj
what  about  350kj
=1mole  x350/850  =  0.412  moles

mass  of  Al =   moles  of  Al x  molar  mass of  Al

=  0.412mol  x  27  g/mol  =  11.124  grams

It has to be b i hope this