chemistry

consider the following equilibrium.
4NH3(g) +3O2(g)<-> 2N2(g) + 6H2O(g)
suppose 0.30mol of NH3 and 0.40mol of oxygen are added to a 5.0L container. If x mol of water is present at equilibrium, what is the equilibrium concentration of oxygen?

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  1. What's K?

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  2. K is not given.

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