Word Count : 184

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The reaction ( \mathrm{N_2 + 3H_2 \rightleftharpoons 2NH_3} ) is a reversible reaction that obeys Le Chatelier’s principle, according to which an equilibrium system responds to an external stress in such a way as to counteract that stress and re-establish equilibrium. When hydrogen gas, ( \mathrm{H_2} ___ ____ _____ _______ _________ _____ _____ __________ _______ __________ ________ _________.
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