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Compute the concentrations of all species in a 1.25 M Na2SO3 sodium sulfite solution. The ionization constants for sulfurous acid are Ka1 = 1.4× 10-2 and Ka2 = 6.3× 10-8.
[Na+]= M
[SO32-]= M
[HSO3-]= M
[H2SO3]= M
[OH-]= M
[H+]= M
An electron in the hydrogen atom makes a transition from an energy state of principle quantum number n to the n=1 state. If the photon emitted has a wavelength of 95nm, what is the value of n?
The mixture had an observed specific rotation of +15.3 degrees. If it is known that the specific rotation of the R enantiomer is -30.8 degree, determine the percentage of each isomer in the mixture.
Calculate the mass of calcium carbonate formed when 25 mL of a solution of calcium chloride at 0.10 M react with sodium carbonate in excess
Solid benzoic acid, C6H5COOH(s), is often used to determine the heat capacity of a bomb calorimeter, because the constant volume heat of combustion of this compound is known with high precision
We have been assuming that the change in U at a constant T is 0; for this problem, do a derivation that provesdu/dp)T =0 for a perfect gas in a closed system.
A sealed chamber contains 5.80 g CH4 and 14.9 g O2 the mixture is ignited. Explain how many grams of Co2 are produced
Calculate the [H3O+] concentration in 0.45 M solution of barbituric acid, HC4H3N2O3. Ka for barbituric acid is 1.0 X10 ^-5.
A solution is made by mixing 49.0 mL of ethanol, C2H6O, and 51.0 mL of water. Assuming ideal behavior, what is the vapor pressure of the solution at 20 degrees celcius
Complete and balance the equation for this reaction in acidic solution. Phases are optional.
If the pH at the beginning of a titration was 4.25 and 9.60 at the equivalence point. What is the pH at the half equivalence point.
A solution containing 10g of a non-ionic compound in 90g water has a freezing point of -3.33 degrees C. Given that Kf = 1.86 degrees C/m for water
1. the analysis of a compound gives it composition as 31.6k 29.3cccl and 39.1 oxygen . determine the empirical formula
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