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Question

Heat of formation of 2 moles of NH3(g) is 90kJ; bond energies of HH andNN bonds are 435kJ and 390kJ mol1 respectively. The value of the bond energy of NN will be:

A
472.5 kJ
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B
945 kJ
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C
472.5 kJ
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D
945 kJ mol1
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