At 550 K, the Kc for the following react...

At 550 K, the Kc for the following reaction is `10^(4) mol^(-1)L . X(g) + Y(g) rarr Z(g)` At equilibrium, it was observed that `[X] = 1/2[Y] = 1/2[Z]` . What is the value of `[Z]("in "mol^(-1)L)`at equilibrium ?

`2 xx 10^(-4)`

`10^(-4)`

`2 xx 10^(4)`

`10^(4)`

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