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Boron nitride ( BN ) is made by the reaction of boron trichloride with ammonia. (a) Write a balanced chemical equation for this reaction. (b) Calculate the standard enthalpy change per mole of BN produced, given that the standard molar enthalpy of formation of BN(s) is (254.4 kJ mol^-1.. (c) Predict (qualitatively) the following physical properties of boron nitride: conductivity, melting point, and hardness. | Numerade
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