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Compute the volume (in mL) of a 0.370 M KOH solution that must be added to 4.000 g of HEPES to give pH of 7.96
Provide a stepwise mechanism for the reaction, showing all electron movement using the curved arrow convention. Sketch a qualitative energy level diagram for the mechanism labeling all relevant points.
Show how you can separate a racemic mixture of R,S-lactic acid in its pure enantiomers using a chiral amine of choice. Draw the reactions using structural formulas and describe the process
distinguish between an organic molecule that is dextrorotary and one that is levorotary.
 What is the pH of the acidic solution before titration? 4.  What is the pH of the reaction mixture after 10.0 mL of NaOH was added?
It took 49sec for 1.0 L of helium to effuse through a pin hole. Explain How long will it take for 1.0 L of methane CH4, to effuse under identical conditions
A 135 mL sample of a 15.0 M ethylene glycol (rm C_2H_6O_2) solution is diluted to 1.50 L.What is the freezing point of the final solution.
the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 18.4 g of biphenyl in 28.0 g of benzene?
Standard solution having the molar concentration 0.0130 M AgNO3. What mass of AgNO3 is required for this purpose?
A 3.46 g sample of zinc heated to 95.4 C was dropped into 50 g of water at 20.7 C in a calorimeter. The temperature rose to 21.2 C. What is the specific heat of zinc?
A gaseous fuel mixture stored at 747 mmHg and 298 K contains merely methane and propane. While 11.3 L of this fuel mixture is burned, it produces 766 Kj of heat. Explain what is the mole fraction of methane in the mixture
What is the molarity of a solution that is 7.00% by mass magnesium sulfate and has a density of 1.071.
When the pH of a solution is 2 units lower than the pKa of the buffer in the solution, the conjugate base/weak acid (A-/HA) is Enter a number only (no scientific notation please).
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