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What are the major products of reaction of each of the following with (i) propanal and (ii) propanone ?(a) LiAlH4 / THF then acidic workup (b) PhMgBr then acidic workup(c) 1,2-ethanediol, H+, heat (d) 2,4-dinitrophenylhydrazine(e) Ph3PCHCH3 (f) NH2OH
How can 1-bromopropane be used to prepare each of the following ?(a) ethanal (b) propanone(c) propanal (d) 2-butanone(e) pentanal
If copper has a photoelectric threshold wavelength of 279 nm, calculate the velocity (m/s) of the electron emitted when copper is illuminated with light with a frequency of 2.33 × 1015 Hz. Express answer in scientific notation.
The element lithium has two naturally occurring isotopes, 7Li (isotopic mass 7.0160 amu, abundance 92.5 %) and 6Li (isotopic mass 6.0151 amu, abundance 7.50 %). Calculate the atomic mass of lithium.
An analysis is performed on a sample of vine that contains unknown concentration of alcohol. A solution containing 0.0450M of ethyl alcohol (the ANALYTE) gives peak area of Aa=630 and a solution containing 0.030 M of propyl alcohol gives a peak of..
FireFlies flash at a rate that depends on temperature. At 29 C the average rate is 3.3 flashes every 10 seconds;at 23 C the average rate falls to 2.7 flashes every 10 seconds.
Isotactic polystyrene that has a density of 1.12 g/cm3 and a weight-average molecular weight of 150,000 g/mol; syndiotactic polystyrene that has a density of 1.10g/cm3 and a weight-average molecular weight of 125,000 g/mol
A mixture of amino acids is subjected to paper electrophoresis at pH 6.0. The amino acids present in the mixture are Val, Glu, Phe, Ser, and Lys. Which amino acids will migrate toward the cathode? Toward the anode? Explain.
Write he basic principles and instrunmentaion of conductomery
Calculate the heat that must be supplied to 0.104g of Ne(g) at 0.250 atm to raise its temperature from 22.0 degree Celsius to 60.0 degree Celsius at
A weak acid, HA has a pKa of 4. In a buffer, the ratio [A-]/[HA] = 10^-2. What is the pH of the solution
Solid CrF3 contains a Cr(III) ion surrounded by six F- ions in an octahedral geometry, all at distances of 190 pm. However, MnF3 is in a distorted geometry with Mn-F distances of 179, 191, and 209 pm (two of each). Suggest an explanation.
An enzyme reduces the activation energy of a reaction at the temperature of 25 degree celsius from 55 kjmol-1 to 15kJ mol-1 by changing the route of the reaction.
Be sure to include a concise discussion of the reasoning. Construct tables summarizing the IR and 1H NMR data, and assign the peaks in the IR and NMR spectra to the appropriate structural elements in U. Explain the appearance of the base peak at m..
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