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A stream of gas containing H2 at an init...

A stream of gas containing `H_2` at an initial partial pressure of 0.20 atm is passed through a tube in which CuO is kept at 500 K. The reaction comes to equilibrium. For this reaction `K_p= 1.6 xx 10^(9).` What is the partial pressure of `H_2` in the gas leaving the tube? Assume that the total pressure of the stream is unchanged.

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