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What mass of ethylene glycol, HOCH2CH2OH, must be dissolved in 4.510 kg of water to result in a freezing point of 18.0°C? What is the boiling point of the same solution?
How many L of solvent should be added to 0.46 L of a 0.28 M solution if you want a final concentration of 0.13 M.
How many grams of oxygen are collected in a reaction where 265 mL of oxygen gas is collected over water at a temperature of 298 K and a total pressure of 709 torr
which solution can conduct an electrical current?
What is the de Broglie wavelength in cm, of a 12.9 g hummingbird flying at 1.14 102 mph? (1 mile = 1.61 km.)
Using a solution of KMnO 4 has a percent transmittance of 27.3 percent when observed in a 1.15-cm cell at a wavelength of 525 nm. Compute the absorbance of this solution.
what is the literature value for the Ksp of potassium hydrogen tartrate in water at 10, 22.5, 35, 50 degrees?
Calculate H in kJ/mol KClO3 for the solution process. KClO3(s) K+(aq) + ClO3-(aq) The specific heat of water is 4.18 J/g-K.
Calculate the pH of 1.00 L of a buffer that is 0.140 M HNO2 and 0.180 M NaNO2. What is the pH of the same buffer after the addition of 1.00 mL of 12.0 M. HCl. (pKa of HNO2 = 3.40). What is the pH of the Original buffer and after HCl is added?
Aerosol cans carry clear warnings against incineration because of the high pressures that can develop upon heating.
For caffeine, the partition coefficient between methylene chloride and water is approximately 8. If you add the following to a separatory funnel - 10 g caffeine,
A person's blood alcohol (C2H5OH) level can be determined by titrating a sample of blood plasma with a potassium dichromate solution. The balanced equation is
Calculate the total pressure if the volume of the reaction container is then (i) doubled; or (ii) reduced 7-fold.
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