Chemistry

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the initial pressure of phosgene gas (COCl2), was 1.31 atm. it was heated, and at equilibrium the pressure of CO was found to be .547 atm. what are the equilibrium pressures of Cl2 and COCl2? CO +Cl2=COCl2
i've done it twice and keep getting the wrong answer

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    If you show your work perhaps we can find the error.

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