If 10-4dm3 of water is introduced into a 1.0 dm3 flask at 300 K, how many moles of water are in the vapour phase when equilibrium is established? (Given, vapour pressure of H2O at 300 K is 3170 Pa, R = 8.314 JK-1 mol-1.

If 10-4dm3 of water is introduced into a 1.0 dm3 flask at 300 K, how many moles of water are in the vapour phase when equilibrium is established? (Given, vapour pressure of H2O at 300 K is 3170 Pa, R = 8.314 JK-1 mol-1.

  1. A

    5.56×10-3 mol

  2. B

    1.53×10-2 mol

  3. C

    4.46×10-2 mol

  4. D

    1.27×10-3 mol

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    Solution:

    n=pVRT=3170×10-38.134×300=1.27×10-3 mol

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