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chemistry
february 2020
14

Chemistry Questions and Answers February 14, 2020

Expert-verified solutions to help you succeed

What is the overall charge on the side chain of lysine when one third (33%) of the side chains are deprotonated?

Potassium dichromate and potassium permanganate have overlapping absorption spectra in 1 M H2SO4. K2Cr2O7 has an absorption maximum at 440 nm, and KMNO4 has a band at 545 nm. A mixture is analyzed by measuring the absorbance at these two wavelengths with the following results: A440nm = 0.405, A545nm = 0.712 in a 1 cm cell. The absorbances of a

Suppose that the formation of mullite from a mixture of alumina and silica powders is a diffusion-controlled process. How would you prove it? If the activation energy is 50 kcal/mole and the reaction proceeds to 10% of completion at 1400C in 1 hour, how far will it go in 1 hr at 1500C? and in 4 hr at 1500C?.

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