Chemistry :(

How much heat is evolved when 878 kg of ammonia is produced according to the following equation?

N2(g) + 3H2(g) 2NH3(g) ΔH = -91.8 kJ

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1. 91.8 kJ x [878,000/(2*17)]= ??

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2. 878000g/34g/mol) * (91.8kJ/mol)
moles

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