### Calculation Kc in terms of X

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**Mon Jan 21, 2019 5:21 pm**For the equation Ni(CO4)<->Ni + 4CO, where x is the equilibrium concentration of CO, how would you put the equation in terms of X. The answer says that it would be x*4/(1.0-x/4) but how would you get the top to be x^4 ?