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A sample of Na2SO4 (s) is dissolved in 225g of water at 298 K such that the solution is 0.25 M in Na2SO4. A temperature rise of 0.112 degrees Celsius is observed. the calorimeter constant is 330.0 J/K. Calculate the enthalpy of solution of Na2SO4 in water at this concentration. Compare your result with that calculated using data tables.
What are the oxidation number of the central atom of the following species. Please explain how to do this.
A low-melting solid A was isolated, which combustion analysis showed had composition C9H10O. The substance gave a precipitate when treated with 2,4-dinitrophenylhydrazine solution.
Calculate the conditional formation constant Kf for the formation of an EDTA complex with copper
In what ways are the mechanistic features of trypsin, chymotrypsin, elastase similar. If the mechanisms of these enzymes are similar, what features of the enzyme active site dictate substrate specificity
The coefficient of heat transfer between a pure saturated vapor and a cold surface canbe predicted by the following equation:
An aqueous solution containing 9.05 g of an optically pure compound was diluted to 500.0 mL with water and placed in a polarimeter tube 10.0 cm long. The measured rotation was -2.95° at 25 °C. Calculate the specific rotation of the compound.
In ethanol, with an absorbance of 1.210 (no units) at a wavelength of 530 nm. At this wavelength, the extinction coefficient of rhodamine 6G in EtOH is 116,000M^-1 cm^-1. If I have a 0.100 M solution of rhodamine 6G, what pathlength cell will be n..
A solution was prepared by dissolving 5.76g of KCL*MgCl2*6H2O (277.85g/mol) in sufficient water to give 2.000L
Draw a potential energy diagram for the reaction between 1-butanol and hydrobromic acid. On your diagram indicate the structures of key reaction intermediates that correspond to energy maxima and minima. (B) What is the reaction type for this reac..
What is the SUM of all of the coefficients in the reaction. 2 C8H18 + 25 O2= 16 CO2 + 18 H2O
what mass of ammonium chloride can be added to 100 grams of water at 20 degrees celcius before the solution becomes saturated?
suppose 50.0 ml of 0.25 m cocl2 solution is add to 25.0ml of 0.350 m nicl2 solution calculate the concentration in
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