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When a non-volatile solute dissolved in water the freezing point of the solution is lowered while its boiling point is increased. Give a practical example from our life on both cases.
The 1H NMR indicates there are three non-equivalent types of hydrogen atoms in your final compound with peaks at ~ 7.30 (m), 4.30(s), and 3.90(s) ppm. The three non-equivalent types of hydrogen atoms are aromatic hydrogens, methylene hydrogens
neutrons are used to obtain images of the hydrogen atoms inmolecules. what energy must be imparted to each neutron in
when reacting cyclopentadiene with maleic anhydride why is theendo-adduct formed exclusively? why does the exo-adduct
one of the lines in the emission spectrum of sodim has a wavelength of 590 nm. what is the frequeuncy of this line?
Write a detailed mechanism for a) the Fischer esterification of acetic acid with ethanol in the presence of sulfuric acid and b) the reaction of acetyl chloride with ethanol.
Why was acetone added to the reaction mixture only after we briefly mixed the catalyst and the behzaldehyde? 3. Why doesn't the dibenzalacetone product react (via the aldol condensation pathway) with the excess benzaldehyde in the reaction mixture..
if you titrated it with .233 M sodium hydroxide solution, and it took 8.33 ml of the base to neutralize the acid, what was the concentration of the nitric acid? Write the Neutralization reaction, balance it, NAME the products THEN solve the proble..
The normal boiling point of bromine is 58.8°C. Given that the vapor pressure of methanol is 75.0 torr at 2.5°C, calculate the molar enthalpy of vaporization of bromine.
An electron in the n = 7 level of the hydrogen atom relaxes to a lower energy level, emitting light of 93.1 nm. What is the value of n for the level to which the electron relaxed
Consider the peptides Gly-Pro-Ser-Glu-Thr (open chain) and Gly-Pro-Ser-Glu-Thr with a peptide bond linking the Thr and the Gly. Are these peptides chemically the same. Why or Why Not
Citric acid is a triprotic acid with pKa1=3.15; pKa2=4.77; pKa3=5.19. Calculate the concentrations of all species in solution.
a sample of sodium dichromate na2cr2o7 is placed into a container by itself. the sample of material in the container is
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