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The fact that boiling point of a pure solvent is lower than the boiling point of a solution of the same solvent is a direct consequence of the
A) freezing-point depression of the solution.
B) vapor pressure of the solution being higher than the vapor pressure of the pure solvent.
C) vapor pressure of the solution being lower than the vapor pressure of the pure solvent.
D)osmotic pressure of the solvent being higher than the osmotic pressure of the solution.
E) osmotic pressure of the solvent being lower than the osmotic pressure of the solution.
A solution of 0.10 M sodium acetate is mixed with a solution of 0.10 M acetic acid (Ka = 1.8*10^-5). When equal volumes of the two solutions are mixed together the resulting mixed has a pH of:
What is the number of moles of atoms of oxygen contained in 49 grams of sulfuric acid, H2SO4?
Each of the four cylinders of a combustion engine has a displacement of 2.0L. If each pison in the four cylinders is displaced against a pressure of 2.0 atm and each cylinder is ignited once per second
What is the molar mass of toluene if 0.85 g of toleune depresses the freezing point of 100 g of benzene by 0.47 degrees C Kf of benzene is 5.12 degrees C/m.
What is the pH at the equivalence point in the titration of 25.00 mL of 0.020 M NH3 with 0.015 M HBr? Kb for NH3 = 1.8 x 10^-5
If 6.46 L of gaseous ethanol reacts with 16.1 L O2, what is the maximum volume of gaseous carbon dioxde produced
How many molecules of carbon dioxide are produced when 149 molecules of acetylene (HCCH) to react in excess oxygen produce carbon dioxide and water?
A buffer is to be prepared by adding solid sodium acetate to 0.10 M CH3COOH. Which of the following concentrations of sodium will produce the most effective buffer
when 45.0 grams of C2H6 are completely combusted, 60 grams of water are produced. Is the ethane pure?
A gas occupies 4.04 L at 860 torr and 10C. What volume will it fill if the pressure is changed to 731 torr and the temperature is raised to 43C
What is the minor product? Explain why the one product is formed preferentially over the other. What reaction conditions can you change to favor the formation of the minor product?
aliquots were transferred to 50-mL volumetric flasks. Each was treated with standard (containing ), diluted to volume with , and analyzed by flame atomic absorption.
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