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A mixture of A and B was partially separated on an HPLC column, resultin in overlap of their chromatographic peaks. The absorbance of the effluent was monitored at 300nm (?A = 1800, ?B= 1600) and 350 nm (?A2100 and ?B=3200). The peak absorbance of the first chromatographic peak at 300nm was 0.020 and at 350nm 0.030. What is the main component of the first eluting peak and what percentage of the total absorbance at 300nm is due to this component?(assuming the light path- length = 1.0 cm)
A solution of only A is made that is initially 0.800 M. After the solution is allowed to reach equilibrium, it is determined that the concentration of B is 1.20 x 10^-4 M. Use this information to determine the equilibrium constant for the reaction..
What is the reason for using a phase transfer catalyst? a)It is used to transfer the catalyst to the active site of the reaction b)It serves as a proton transfer agent which moves protons from a base to an acid
When 5.00 g of fructose, C6H12O6, (FW 180.16 g/mol) is burned in a calorimeter whose heat capacity is 29.7 kJ/oK, the temperature increases by 2.635oK. Calculate the heat of combustion of fructose in kJ per mole.
If the initial volume of the container, before any reaction takes place, is 5.70 L, determine the volume of the container after the N2 (g) and H2 (g) have reacted to completion.
briefly describe how the atomic radii and ionization energies of group 1a1 elements compare with those of group 8a18.
the vapor pressure of water is 25 mmHg: a) What is the pressure of the dry O2 gas? b) How many moles of O2 were produced? c) How many grams of KClO3 were produced
Calculate the pressure exerted by 12.3 moles of neon gas in a volume of 5.55 L at 25C using (a) the ideal gas equation and (b) the van der Waals equation
an unknown organic compound is mixed with 0.5190 g of naphthalene crystals to give a mixture having a total mass of
LiI has a lattice E of -7.3x10^2 kJ/mol and a heat of hydration of -793kJ/mol. Heat of solution is -60kJ/mol. Determine how much heat is evolved
You are titrating 110.0 mL of 0.080 M Ca2 with 0.080 M EDTA at pH 9.00. Log Kf for the Ca2 -EDTA complex is 10.65, and the fraction of free EDTA in the Y4- form, ?Y4-, is 0.041 at pH 9.00.
How many kJ of heat are needed to completely vaporize 1.30 moles of The heat of vaporization for water at the boiling point is 40.6 kJ/mole.
the fraction of the initial mass of gas remaining in the tank if carbon dioxide obeys the ideal gas and PR equations of state
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