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Library of Conceptual Questions (CQs): Liquids
If 0.10 mL of liquid water (0.0997 g of water) is introduced into a 1.00 L flask at 25oC, how many moles of water are in the vapor phase when equilibrium is established?  The vapor pressure of water at 25oC  is 23.8 mm Hg.

(A) 1.23 x 10¯3
(B) 2.27 x 10¯3
(C) 5.53 x 10¯3
(D) 1.54 x 10¯2
(E) 4.45 x 10¯2


If 1.00 mL of liquid water (0.9970 g of water) is introduced into a 1.00 L flask at 25oC, how many moles of water are in the vapor phase when equilibrium is established?  The vapor pressure of water at 25oC  is 23.8 mm Hg.

(A) 1.23 x 10¯3
(B) 2.27 x 10¯3
(C) 5.53 x 10¯3
(D) 1.54 x 10¯2
(E) 4.45 x 10¯2

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