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One mole of N(2)O(4)(g) at 300 K is kept...

One mole of `N_(2)O_(4)(g)` at 300 K is kept in a close container under one almosphere it is heated to 600 K when `20%` by mass of `N_(2)O_(4)(g)` decomoses to `NO_(2)(g).` The resultant pressure is

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The correct Answer is:
` K _p = 0.3136 at m ^(2) `
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