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chemistry
february 2020
11

Chemistry Questions and Answers February 11, 2020

Expert-verified solutions to help you succeed

In benzaldehyde, two of the ring protons have resonance at 7.87 ppm, and the other three have resonance in the range from 7.5 to 7.6 ppm. Explain.

the basis of the method of initial rates used in this experiment is that the concentrations of reagents are essentially unchanged during the measurement time period. calculate the % of the initial (NH 4 ) 2 S 2 O 8 that has reacted when the blue colour appears C KI = 0.016 C (NH4)2S2O8 = 0.024 C NaS2O3= 0.00014

Consider the following voltaic cell Voltmeter Salt bridgo Zn Co 1 M Co2 (a) in which direction do electrons flow in the external circuit (b) In which halfcell does reduction occur (C) In which halfcell do electrons leave the cell (d) At which electrode are electrons generated (e) Which electrode is positively charged (f ) Which electrode increases

Make a threedimensional drawing illustrating the magnetic anisotropy in 15, 16dihydro15, 16dimethylpyrene, and explain why the methyl groups are observed at 4.2 ppm in the 1H NMR spectrum. CH3 CH3 15, 16Dihydro15, 16dimethylpyrene

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