Solubility Worksheet With Answers Page 5
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825) The mole fraction of urea (MW = 60.0 g/mol) in a solution prepared by dissolving 16 g of urea in
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39 g of H 2 O is __________.
A) 0.37
B) 0.58
C) 0.13
D) 0.11
E) 9.1
26) The concentration of urea (MW = 60.0 g/mol) in a solution prepared by dissolving 16 g of urea in 39
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g of H 2 O is __________ molal.
A) 6.9
B) 96
C) 0.11
D) 6.3
E) 0.68
27) The molarity of urea in a solution prepared by dissolving 16 g of urea (MW = 60.0 g/mol) in 39 g of
27)
H 2 O is __________ M. The density of the solution is 1.3 g/mL.
A) 0.11
B) 6.8
C) 3.7
D) 0.16
E) 6.3
28) What is the molarity of sodium chloride in solution that is 13.0% by mass sodium chloride and that
28)
has a density of 1.10 g/mL?
A) 143
B) 2.23
C) 2.45
D) 1.43 × 10 -2
E) 2.56
29) The concentration of sodium chloride in an aqueous solution that is 2.23 M and that has a density of
29)
1.01 g/mL is __________% by mass.
A) 45.3
B) 12.9
C) 10.1
D) 2.21
E) 7.83
30) The vapor pressure of pure ethanol at 60 °C is 0.459 atm. Raoult's Law predicts that a solution
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prepared by dissolving 10.0 mmol naphthalene (nonvolatile) in 90.0 mmol ethanol will have a
vapor pressure of __________ atm.
A) 0.0918
B) 0.498
C) 0.790
D) 0.367
E) 0.413
31) The vapor pressure of pure water at 25 °C is 23.8 torr. What is the vapor pressure (torr) of water
31)
above a solution prepared by dissolving 18.0 g of glucose (a nonelectrolyte, MW = 180.0 g/mol) in
95.0 g of water?
A) 23.4
B) 24.3
C) 0.451
D) 0.443
E) 23.8
32) The vapor pressure of pure water at 25 °C is 23.8 torr. Determine the vapor pressure (torr) of water
32)
at 25 °C above a solution prepared by dissolving 35 g of urea (a nonvolatile, non-electrolyte, MW =
60.0 g/mol) in 75 g of water.
A) 0.88
B) 3.3
C) 21
D) 27
E) 2.9
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