Determine the kj of heat released per gram

Question

2B₅H₉(l) + 12O₂(g) -->5B₂O₃(s) + 9H₂O(l)

Determine the kJ of heat released per gram of the compound reacted with the oxygen. The standard enthalpy of formations for B2O3(s), B5H9 (l) and H2O(l) are 42.84 kJ/mol, -1271.94 kJ/mol and-285.83 kJ/mol respectively.