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A 2.29 g sample of ascorbic acid is titrated with a 0.64 M red dye. What volume of red dye is required to reach the endpoint?
Molar mass of red dye=267.08 g/mol
Molar mass of ascorbic acid=176.12 g/mol
Discuss the differences observed in the IR and NMR spectra of 3-nitrophthal-hydrazide and luminol that are consistent with reduction
how many possible trisubstituted derivatives c6h3x2y can be obtained from the meta disubstituted benzene c6h4x2? (ignore directive effects of the substituents x and assume that all positions on the ring are accessible to the reagent y+).
Calculate the percent manganese in the sample as Mn3O4 (only part or none of the manganese may exist in this form, but we can make the calculations on the assumption that it does)
The relative electrophoretic mobilities of a 30-kd protein and a 92-kd protein used as standars on an SDS polyacrylamide gel are 0.80 and 0.41, respectively.
the electrode half-reactions and calculate the standard potential of the following cell: Cu / Cu2+(aq) // Mn2+(aq),H+(aq) / MnO2(s) / Pt
Calculate the molecular mass of the nonionic solutes: 8.02 g of solute in 861 g of water lower the freezing point to -0.430 degrees C.
Making a dilute solution, A student in lab class needs to provide a detailed description of how to make a dilute solution of 500 g
One can approximate boiling point at reduced pressure using a pressure-temperature nomograph. What would you expect the observed boiling pint to be at 50 torr(mm) for a liquid that has a boiling point
A student ran the following reaction in the laboratory at 689 K H2(g) + I2(g) 2 HI(g)
Some sample solution was spilled into the outside of the graduated cylinder while preparing the sample, and before determining the volume.
Calculate the "molar heat of dissolution" (kJ/mol). Recall heat capacity of water is 4.184 J/g degrees celsius.
One approach to the synthesis of virstatin is shown above. An SN2 reaction of an anionic imide nucleophile (formed by deprotonation of1) with an alkyl halide electrophile 2 affords virstatin ethyl ester 3 Base-inducedhydrolysis
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