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At 8.2^@C, 0.778 mol dm^-3 of N2O4 and ...

At `8.2^@C, 0.778 mol dm^-3 ` of `N_2O_4` and `2.84 times 10^-3 mol dm^-3` of `NO_2` were observed in certain experiment in a chloroform solution. Calculate the value of equilibrium constant for the reaction, `2NO_2(g) leftrightarrow N_2O_4 (g)`.

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`9.6 times 10^4 dm^3 mol^-1`
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