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Calculate the expected pH of a 25.0 ml solution of 0.200 M acetic acid that is being titrated with a 0.100 M solution of NaOH at any point in the region II of the titration. (Ka of CH3COOH = 1.8 x 10^-5)
Ethanol melts at -114 celcius and boils at 78 celcius . The enthalpy of fusion of ethanol is 5.02 KJ/mol , and its enthalpy of vaporization is 38.56 KJ/mol.
Each of the following compounds exhibits a single 1H NMR peak. Approximately where would you expect each compound to absorb? a. cyclohexane b. acetone c. benzene d. glyoxal (ethandial) e. dichloromethane f. trimethylamine ((CH3)3N)
A gas sample containing 1.65 mol at 25°C exerts a pressure of 413 torr. Some gas is added to the same container, and the temperature is increased to 50.°C.
Which substance would be in top layer when each of the following pairs of solvents are added to the same container
calculate What mass of AlBr 3 is formed and calculate what mass of CCl 4 will be formed if 1.5 moles of CH 4 react with 1.4 moles of Cl?'
In the following chemical equation, what is the reactant. CuSO4·5H2O(s) ® CuO(s) + SO3(g) + 5H2O(l)
A protein contain the following amino acids 61 LYS 75 GLU 26 TYR 22 HIS 45 PRO 47 PHE 29 ARG 67 GLY 77 ASP 65 ALA 24 THR 25 MET 71 VAL 56 ILE 12 SER 83 LEU A) What is its net charge at pH 13
Choose the answer which presents the chemical formulas NF3, NaBF4, and BF3 in order of increasing solubility of the substances with these formulas in hexane (lowest solubility listed first)
A certain substance, intially present at 0.950 M, decomposes by first-order kinetics with a rate constant of 1.25 x10-2 mol m-1 s-1. calculate the time (in seconds) required for the system to reach a concentration of 0.431M
Write a reaction mechanism for the reaction of (Z) 3-methyl-3-hexene with Cl2 and H2O. Use curved arrows to show electron movements and clearly show the structures of the reaction intermediates and the final product.
In a particular redox reaction, Cr is oxidized to CrO42%u2013 and Ag is reduced to Ag. Complete and balance the equation for this reaction in acidic solution. Phases are optional.
A 3.18 L sample of hydrogen chloride (HCl) gas at 1.64 atm and 31 degrees C is completely disolved in 710 mL of water to form hydrochloric acid solution. Calculate the molarity of the solution. Assume no change in volume
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