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With the help of the sawhorse representations and newman projections illustrate the stereochemistry of the products from the E2 dehydrobromination of (R,R) and meso-(R,S)-2,3-dibromobutane
Why is the injector/detector temperature set at 180 C while the column temperature is only at 90 C and why is it possible to inject the sample directly with a syringe onto the top of the column in GC but not HPLC
question the polar ice caps contain about 2.3 1019 kg of ice. this mass contributes essentially nothing to the earths
A 28.0-g sample of water at 290. K is mixed with 51.0 g water at 310. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
The Ka value for boric acid is 5.8* 10^{-10}. What is the pH of an aqueous eye wash solution that is 1.3% boric acid by mass? Assume the density of the solution is the same as that of water.
A 25.0-mL sample of 0.100 M propanoic acid (HC3H5O2, Ka = 1.3 10-5) is titrated with 0.100 M NaOH solution. Calculate the pH after the addition of the following amounts.
what are some differences between a titration curve of a strong acid with strong base amp a titration curve of a weak
Calculate the heat capacity of methanol (methyl alcohol) at 40°C. 2.6kg of methanol at 15 C enter an evaporator. They exit as vapour at the boiling point.
Explain the reason why the six atoms that are involved in the peptide bond share a common geometric plane
Which of the following solvents would be the best choice to extract a slightly-polar organic compound from an aqueous solution? Explain why each of other solvents is less desirable than the solvent you have chosen.
Calculate the mass of silver chloride required to plate 245 mg of pure silver. Silver chloride, often used in silver plating, contains 75.27% Ag
Describe how you would prepare a 500 mL of a solution which is 0.500 M sodium and 1.60 M phosphate if you only had sodium chloride and potassium phosphate available
What would be the predicted effect on glutamine synthesis if a mutation is glutamine synthetase increases the Km to the micromolar range for the regulatory protein Pa but has no effect on the Km
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