The above reaction was used to fuel the rockets in the Apollo mission landing module.

A) Is this reaction endothermic or exothermic?

B) How many grams of N2H4 must be reacted with an excess of N2O4 to produce 775 kJ of energy?

C) How many kJ of energy are produced when 6.25 g of N2O4 reacts with an excess of N2H4?​