The decomposition of 20g of ammonia requires 5.44×104J of energy to give hydrogen and nitrogen gases. How much energy is released when hydrogen and nitrogen gases react to produce 20g of ammonia?
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Answer:
Ammonia is NH3 so the weight of hydrogen in 150g of ammonia would be the mass times the weight of hydrogen in the formula divided by the total formula wt: 150g (3 x 1.01)/[14.01 + (3 x 1.01)] = 26.7g
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