x g sample of `NH_(4)NO_(3)` is decomposed in a Bomb calorimeter. The temperature of calorimeter increase by `4^(@)C`. The heat capacity of the system is `1.25 " kJ"//.^(@)C`. Calculate the value of x. Given molar heat of decomposition of `NH_(4)NO_(3)` at constant volume is 400 kJ `" mol"^(-1)`.
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