Ideal gasses

Q: Which are stronger, intramolecular forces or intermolecular forces ?

(a) :  Intramolecular forces
(b) :  Intermolecular forces
(c) :  None of the Above
Answer:  Intermolecular forces

Q: What is the pH of a 0.001 M formic acid solution ? Ka = 1.8x 10-4

(a) :  3.74
(b) :  10.3
(c) :  3.37
(d) :  10.6
(e) :  None of the Above
Answer:  3.37

Q: Why doesn't water conduct electricity well?

(a) :  Huh? Water is an excellent conductor of electricity!
(b) :  Pure water contains very few ions.
(c) :  The hydrogen bonding in water cause the molecules to move slowly from one place to another.
(d) :  None of the above is correct.
(e) :  None of the Above
Answer:  Pure water contains very few ions.

Q: Why does the vapor pressure of a soultion decrease when an ionic compound is added to it ?

(a) :  The mole fraction of solvent is higher, causing a loer vapor pressure
(b) :  There are fewer solvent molecules at the surface, so fewer can vaporize and leave the solution
(c) :  Most solute have a positive heat of solvation, causing the temperature of the solution to decrease
(d) :  none of these
(e) :  None of the Above
Answer:  none of these

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