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At 850.0 K, the value of the equilibrium constant Kp for the hydrazine synthesis reaction below...

At 850.0 K, the value of the equilibrium constant Kp for the hydrazine synthesis reaction below is 0.3350.
N2(g) + H2(g) <--> N2H2(g)

If a vessel contains an initial reaction mixture in which [N2] = 0.01500 M, [H2] = 0.02500 M, and [N2H2] = 2.500×10-4 M, what will the [N2H2] be when equilibrium is reached?

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