question_answer

If \[{{10}^{-4}}d{{m}^{3}}\] of water is introduced into a \[1.0d{{m}^{3}}\] flask at 300 K, how many moles of water are in the vapour phase when equilibrium is established?             (Given: Vapour pressure of \[{{H}_{2}}O\] at 300 K is 3170 Pa; \[R=8.314\,J{{K}^{-1}}mo{{l}^{-1}}\])

A) \[5.56\times {{10}^{-3}}mol\]   

B) \[1.53\times {{10}^{-2}}mol\]

C) \[4.46\times {{10}^{-2}}mol\]  

D) \[1.27\times {{10}^{-3}}mol\]