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Calculate the vapor pressure of a solution made by dissolving 75.9 g of urea (molar mass= 60.06 g/mol) in 197.5 mL of water at 35C. (Hint: the vapor pressure of pure water at 35C is given in Chang Table 5.3 Assume the density of the solution is 1.00 g/mL)Answer in the mmHg
Also what is the magnitude of vapor -pressure lowering?
What are some reasons why there would be a difference between the expected and actual values for the moles of copper oxide produced from heating copper in the air.
What is the percentage purity of your ldh column fraction? 2. How many total mg of ldh are there in your column fraction?
A weak acid HA (pKa = 5.00) was titrated with 1.00 M KOH. The acid solution had a volume of 100.0 mL and a molarity of 0.100 M. Find the pH at Vb = 0 mL, Vb = 10.1 mL and Vb = 12.0 mL
A reaction has a rate constant of 0.0686 sec-1; how long will it take (in minutes) until 0.198 mol/L of the compound is left, if there was 0.715 mol/L at the start? (give answer to 3 sig figs using E notation)
exactly one mole of nitrogen gas confined within a cylinder by a piston is heated from 0degc to 873degc at 1.00 atm.a
If 19.2 g of CO2 is produced in the reaction of C2H2 with O2 to form CO2 and H2O, how many grams of H2O are produced in this reaction.
Briefly discuss the theories and important experiments that led to the determination that light is both a wave and a particle. i will rate the responses later
the tosylate of 2s3r-4-methyl-3-phenylpentan-2-ol undergoes an e2 elimination on treatment with sodium ethoxide. draw
Calculate the amount of vitamin C in mg that are titrated by one milliliter of the 0.05N iodine solution.
What is the wavelength of a light ray if its frequency is 4.64 x 1014 s-1? answer in units of nanometers (nm).
The mass of the carbon dioxide was 30.50 g, and the mass of the water was 14.98 g. What was the empirical formula of the hydrocarbon
Write a chemical reaction equation that shows what happens when HNO3 is added to MnCO3. Remember to include the physical state symbols.
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