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3N

_{2}H

_{4}--> 4NH

_{3}+ N

_{2}

Why is it that the agents are products of the equation, shouldn't they be the reactants? I'm also not really sure how to write the half-equations since there are two compounds with Nitrogen. How do I write out the equation for the half-equation on Hydrogen since it is always supposed to be +1 so it is a spectator ion?

Sry but I'm really unsure of these redox reaction questions. Thanks for the help.