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An unknown sample of dopamine gave a current of 34.6 nA in an electrochemical analysis. Then 2.00 mL of solution containing 0.0156 M dopamine was mixed with 90.0 mL of unknown, and the mixture was diluted to 100.0 mL in volumetric flask. The signal from the new solution was 58.4 nA. What is the dopamine concentration in the unknown sample?
There is an inherent flaw in the drying procedure for the gravimetric determination that causes the measured mass of BaSO4 to be erroneously high
Outline a detailed scheme utilizing extractions that he can use to separate the mixture back into the pure components before the professor finds out.
The structure of HxWO3 could contain H+ ions or OH- ions. Which do you think is more likely? Why?
What types differences in the H-NMR spectra of starting material and product do you expect to see camphor, borneol
a given mass of neon gas has a volume of 25.0 liters at a pressure of .75 atm. if the pressure is changed to 300.0 torr and the temperature remains constant , what will the volume of neon be
Calculate the work in Joules when 2.5 mols of water vaporizes at 1 atmosphere pressure and 25 degrees C. The work is done in pushing back the atmosphere.
What is the greatest pressure if 800 kPa is increased in volume from 1.75L to 3.00L and temp is increase from 65 degrees C
What is the value of the equilibrium constant for transformation of carbon from graphite to diamond at 810.0 C?
How does the law of definite proportions help to distinguish between a compound of certain elements
If 8.00 kJ of heat are added to 200. g of water at 20.0 C, what is the final temperature of the water?
What is the freezing point of a solution of aluminum chloride that contains 42.0 g AlCl3 dissolved in 530. g of water?
As a separation and detection method, would TLC or paper chromatography yield better results in the analysis of each of the following pairs of compounds?
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