Answer: 91.29 grams
Explanation:
[tex]2Al_2O_3(s)+3352kJ\rightarrow 4Al(s)+3O_2(g)[/tex]
Endothermic reactions are those chemical reactions in which heat is absorbed by the reactants.
According to stoichiometry,
3352 kJ of energy is absorbed by 2 moles of [tex]Al_2O_3[/tex]
Thus 1500 kJ of energy will be absorbed by=[tex]\frac{2}{3352}\times 1500=0.89moles[/tex] of [tex]Al_2O_3[/tex]
Mass of [tex]Al_2O_3=moles\times {\text {Molar mass}}=0.89\times 102g/mol=91.29g[/tex]
