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Explain what is the stereochemical basis of the observation that D-aspartyl-D-Phenylalanine has a bitter taste, whereas L-aspartyl-L-Phenylalanine is appreciably sweeter than sugar?
Starting with 2 different samples of propyne, show how you can make 2-methyl-pent-3-yn-2-ol (condensed formula (CH3)2C(OH)C=CCH3 ). In other words, you can convert propyne into a nucleophile, and convert propyne into an electrophile, and react the..
A certain reaction is spontaneous at 134*C if the enthalpy change for the reaction is 198 kJ/mol. The minimum value of delta s for the reaction has to be
Xenon gas is released during a certain chemical reaction and pushes back the atmosphere with a change in volume of the vessel (it has a movable piston) from 2 to 20 Liters. Calculate the work done by this release of gas.
to make a phosphate buffer at ph 9.6 starting with 1l of 10 mm phosphoric acid h3po4 pks are of 2.15 6.82 and 12.38
When a 3.25 g sample of solid sodium hydroxide was dissolved in a calorimeter in 100.0 g of water, the temperature rose from 23.9 °C to 32.0 °C. Calculate ?H (in kJ/mol) for the solution process: NaOH (s) → Na+ (aq) + OH- (aq)
what do atoms with a strong attraction for electrons they share with another atom exhibit. What are the formulas for nonpolar covalent compound, polar covalent compound, and ionic compound.
Calculate the mass of nitrogen dissolved at room temperature in an 83.0 {rm L} home aquarium. Assume a total pressure of 1.0 {rm atm} and a mole fraction for nitrogen of 0.78.
Calculate the kg/h of wet cake feed needed to produce 1000 kg/h of "dry" ?sh cake product.
When 24 mL of a 190 mL stock solution containing 1.8 M BaF2 is diluted to 78 mL, what is the concentration of Ba2+ in the new solution?
rate constants for the reaction no2g cog -----gt nog co2g are 1.31 m-1s-1 at 700. k and 23.0 m-1s-1 at 800. k.a what
A 0.7995 g sample of a compound containing only uranium and chloride is dissolved in water and excess aqueous silver nitrate is added to precipitate 0.9982 g of silver chloride . Calculate the empirical formula of the compound.
Polonium crystals have a simple cubic unit cell. If the edge length of a unit cell is 310. pm, what is the radius a polonium atom
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