in the reaction of aluminium and iron (III) oxide to form iron and aluminium oxide, H-850 kJ. how many grams of aluminium oxide are formed when 350 kJ are released?

Question

2Al(s) + Fe2O3 -- Fe(s) + Al2O3(s) H=-850 kJ

Answer 1

Is that delta H for the reaction as written? If so then,
molar mass Al2O3 x (350/850) = ?

Answer 2

84g is one of the options.