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A buffer solution contains 0.71 mol of boric acid (H3BO3) and 0.53 mol of sodium dihydrogen borate (NaH2BO3) in 4.00 L. The Ka of boric acid (H3BO3) is Ka = 5.8e-10. pH of buffer solution?
Calculate the wavelength of the light emitted when the electron in a hydrogen atom falls from the n=4 shell to the n=3 shell. [1eV=1.6023*10^-19 J] report answer in meter and in nanometers
Determine the precipitate that forms if silver nitrate aqueous solutions and KCl react to produce products in a double-replacement reaction.
Discuss some of the underlying reasons for deviation from A=ec during the application of Beer's Law to very diluted
Assume that a particular reaction evolves 250 kj of heat and that 34 kj of PV work is gained by the system. What is the enthalpy?
Codeine, C18H21NO3, a commonly prescribed painkiller, is a weak base. A saturated aqueous solution contains 1.00 g codeine in 120 mL of solution and has a pH = 9.8. What is the Kb of codeine?
Find the molecular, ionic, and net ionic equations for the following. Underline all solids. If no reaction occurs, complete the molecular and ionic equations, but wrtie "no reaction" in place of the net ionic equation.
The energy (in kJ) that is removed as heat from this system when the Carnot refrigerator from part a) contains 340. g of R-12. Assume the heat is removed in a constant pressure process.
What is the structure (including functional groups)? Stereochemistry (racemic or single enantiomer)?
calculate the total volume of hydrogen gas which would be collected at 760 mm Hg and 25 degrees celsius. Will a second gas be present in the sample collected by water displacement
How many total moles of oxygen gas can be generated through this decomposition? B. If this oxygen is formed within the bottle described in question 1, what change in pressure would be predicted?
find the number of representative particles in each substance a)3.00 mol Sn b)0.400 mol KCI c)7.50 mol SO2 d)4.80x103 mol NaI
According to the data, what is the value of delta H for the reaction.
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