Heat of atomisation of `NH_(3)` and `N_(2)H_(4)` are `"x kcal mol"^(-1)` and `"y kcal mol"^(-1)` respectivel

Heat of atomisation of `NH_(3)` and `N_(2)H_(4)` are `"x kcal mol"^(-1)` and `"y kcal mol"^(-1)` respectively. Calculate average bond energy of `N-N` bond.
A. `(4y-3x)/(2)" kcal mol"^(-1)`
B. `(2y-3x)/(3)" kcal mol"^(-1)`
C. `(4y-3x)/(4)" kcal mol"^(-1)`
D. `(3y-4x)/(3)" kcal mol"^(-1)`

Heat of atomisation of `NH_(3)` and `N_(2)H_(4)` are `"x kcal mol"^(-1)` and `"y kcal mol"^(-1)` respectively. Calculate average bond energy of `N-N`

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