The vapour pressure of a liquid solution containing \( A \) and \( B \) is 99 torr. Calculate mo...

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The vapour pressure of a liquid solution containing \( A \) and \( B \) is 99 torr. Calculate mole \( \% \) of \( B \) in vapour phase.
\( \left(\right. \) Given \( : P_{A}^{\circ}=100 \) torr \( ; P_{B}^{\circ}=80 \) torr)
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