# Chemistry

posted by kendra

Which of the following statements is (are) true?
A. The vapor pressure of CO2 is lower than the vapor pressure of water.
B. Sea water has a lower vapor pressure than distilled water.
C. The vapor pressure of 1 m NaCl is higher than the vapor pressure of 0.5 m KNO3, assuming that the solvent in each case is water.
D. The vapor pressure of 1 m sucrose (C12H22O11) is higher than the vapor pressure of 1 m NaCl where the solvent is water.
E. The vapor pressure of 0.10 m NaCl is higher than the vapor pressure of 0.05 m MgCl2, assuming the solvent in each case is water.

1. DrBob222

What do you think about these. You know A can't be right because CO2 is a gas at room temperature and H2O is a liquid. B certainly is true since
P(soln) = X(solvent)*P(solvent) and sincd X(solvent) is lower for solutions than it is for pure liquid, the vapor pressure of the solution must be less.

2. michael

why do the water vapor change back to a liuid

3. Anonymous

Rank these aqueous solutions in order of decreasing freezing point:

1 m Na2SO4

1 m LiF

1.5 m CaCl2

1.5 m glycerol

2 m NH4Cl

4. Anonymous

4.0 mole of an ideal gas at at temp of _33degree exerts a pressure of 5 atm.what will be its volume in dm at this temp?

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