The decomposition of a compound 'P' at temperature \( T \), according to the following equation ...

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The decomposition of a compound 'P' at temperature \( T \), according to the following equation
\[
2 \mathrm{P}(\mathrm{g}) \rightarrow 4 \mathrm{Q}(\mathrm{g})+\mathrm{R}(\mathrm{g})+\mathrm{S}(\mathrm{l})
\]
is a first-order reaction. After 30 minutes, from the start of the decomposition in a closed vessel, the total pressure developed is found to be \( 445 \mathrm{~mm} \) and after a long time, the total pressure is \( 625 \mathrm{~mm} \). The vapour pressure of \( \mathrm{S}(l) \) at this temperature is \( 25 \mathrm{~mm} \). The total pressure after 60 minutes is
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