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A solution is made by mixing equal masses of methanol, CH4O, and ethanol, C2H6O. Determine the mole fraction of each component to at least three significant figures.
X meth=
X eth =
dissolved .31 grams of KHP in 25 ml of water and it required 15.5ml of NaOH to reach end of titration, how many moles of KHP were originally present before the addition of the NaOH?
Suppose y was measured five times and average of these five measurements was 3.75. What is the uncertainty in x based on these five measurements?
A 5.00 mL standard phosphate solution containing 45.0 mg of phosphate per liter is added to a second 2.00 mL sample and diluted to 100.0 mL. The absorbance of this solution is 0.506 at 700 nm. Calculate the concentration of phosphate in the origin..
Metals such as magnesium and zinc react with dilute sulfuric acid to give hydrogen, according to the equation: M (s) + H2SO4 (aq) -------> MSO4 (aq) + H2 (g) When 5.00 g of a mixture of powdered magnesium and zinc were dissolved in diluted sulfuri..
A catalyst lowers the activation energy of a reaction from 215 kJ to 206 kJ. By what factor would you expect the reaction-rate constant to increase at 25*C? Assume that the frequency factors
The product of the complete hydrolysis contained 1.8 mg of the compound shown below, and no other 2,4-dinitrophenyl derivatives of the ?-amino groups of other amino acids could be found How many polypeptide chains are in this protein?
Carry out a calculation that would show only Al(OH)3, but not Mg(OH)2, will form precipitate in a solution that contain 0.10 M Al3+ and 0.10 M Mg2+ if the solution is buffered at pH = 9.00.
Calculate the percent yield for an experiment in which 5.50 g of SOCl2 was obtained in a reaction of 5.80 g of SO2 with excess PCl5
Separation of Amines and Carboxylic Acids Using Extraction, Initially have a sample of a water-insoluble, neutral organic compound dissolved in 50 mL methylene chloride that may be contaminated with
Calculate the pH of 0.500L of a buffer solution composed of 0.20 M butyric acid (CH3(CH2)2)2COOH, Ka = 0.000015) and 0.10 M sodium butyrate, (NaCH3(CH2)2COO).
A gas is heated from 14 degrees celsius to 121 degrees celsius and the volume increased from 15.0 liters to 41.4 liters. If the original pressure is 1 atm, what would the final pressure be?
You need to determine value of ?G° for CO(NH2)2(s) + H2O(l) CO2(g) + 2NH3(g)?
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