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The reaction of pure (S)-2-chlorobutane with sodium cyanide in dimethylsulfoxide produces pure (R)-2-cyanobutane. Explain why a racemic mixture is not expected for this reaction if it occurs via an Sn2 mechanism.
How much heat is released when 105 g of steam at 100 Co is cooled to ice at -15Co? the enthalpy of vaporization of water is 40.67 KJ/mol, the enthalpy of fusion for water is 6.01KJ/mol,
Calculate the number of moles of solute present in eahc other following solutions: a) 60.0g of an aqueous solution that is 1.25 percent KI by mass, b) 250g of an aqueous solution that is 0.460 percent NaCl by mass, c) 0.600L of 1.25M H2SO4.
680 mL of a solution of unknown concentration is diluted to a final volume of 1700 mL where the concentration is found to be 1.2 M. What was the initial molarity
what is the volume in milliliters of 20.0 g of acetone if the density of acetone is .791 g/ml?
A first-order reaction has a half-life of 55.0 min at 25 ºC and 6.8 min at 100 ºC. What is the activation energy for this reaction
Without referring to a periodic table, write the electron configuration of the elements with the following atomic numbers Z=9, Z=20, Z=26,Z=33
A weak acid HX has a dissociation constant (Ka) of 1 x 10?9. Which of the following statements about a 0.1 M solution of HX in water
Why does the processing of a crystalline material like nylon require more critical thermal control as opposed to an amorphous material like ABS
If the standard enthalpy of combustion of octane, C8H18(l), at 298 K is -5471 kJ x mol-1, calculate the standard enthalpy of formation of octane. The standard enthalpies of formation of carbon dioxide and liquid water are -393.51 and -285.83 kJ x ..
A mixture of 0.10 mol of NO, 0.050 mol of H2, and 0.10 mol of H2O is placed in a 1.0- L vessel at 300 K . The following equilibrium is established:
a 5.00 mL sample of isopropyl alcohol has a mass of 3.930 g when measured at 20 degrees Celsius? what is the specific gravity of isopropyle alcohol?
A solid sample weighing 0.2736 g of ethylammonium chloride appreciably contaminated with ammonium chloride (but no other contaminants) required 34.20 mL of 0.08177 M NaOH for complete titration. Find the weight percent of each component in the mix..
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