2. A solution contains the same mass of two substances, substance A, which weights 200 g, and substance B, which weights 50 g. What is the mole fraction of substance A in this solution?
1/5 1/4 4/5 5/4 2/3
3. Van't Hoff's factor, i is incoporated into some equations due to
a constant value that adjust for the pressure in the lab some electrolytes break up into ions a correction factor that makes data match up with hypothesis Van't Hoff factor I is a constant that corrects all osmotic equations none of the above
4. Which of the following would serve as the best electrical conductor (assuming constant molarities)?
HC2H3O2 H2O H2CO3 H2SO4 HF
5. Calculate the pressure needed to prevent osmosis when 10.0 g KCl is added to 150 mL of water at 25oC.
20.1 atm 40.1 atm 65.7 atm 80.2 atm 160 atm
| about us | contact us
tutorials index | organic
chemistry | practice tests | online
quizzes | reference tools
site copyright (c) 2002 to neopages.com