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A specific steroid has ?max = 219 nm and molar absorptivity ? = 11,500. What is the concentration of the compound in a solution whose absorbance at 219 nm is A = 0.080 with a sample pathlength of 1.00 cm?
How much work must be done to bring ion A and ion B together into an activated complex. The charge of ion A is +2 and it's ionic radius is 2.85 A and if the charge on ion B is +1 and it's ionic radius is 1.35 A
How many grams of diphenyl (C 12H10) must be dissolved in 655 g of benzene to lower the freezing point by 3 .20ºC.
For the equilibrium H2+CO2-> Kc= 3.18 at 1106K. If each of the 4 species was initially present at a concentration of 3.000M.
Hydrogen peroxide H2O2 decomposes according to the equation: H2O2(liquid) = H2O (liquid) + 1/2O2 (g) From the following data, calculate the value of delta G for this reaction at 25 degrees C for a mol of hydrogen peroxide.
Calculate the P-Cl bond energy, given the following reaction and the average bond dissociation energy of chlorine as 240kJ/mole.
What is the enthalpy of combustion (in kJ/mol) for acetone (CH3COCH3) under standard conditions (water is produced as a liquid)? Use the appendix in your textbook, do not enter units, and answer with 5 significant digits.
Ephedrine was once used in diet pills that could be purchased without a prescription. Ephedrine is composed of 72.7% C, 9.15% H, 8.49% N, and 9.68% O. What is the empirical formula for ephedrine
How would this affect the calculated Ksp (for Ca(OH)2)? How would this affect the calculted molar solubility of Ca(OH)2
A gas sample has an original volume of 700 ml when collected at 750 mm and 25°C. What will be the volume of the gas sample if the pressure increases to 810 mm and the temperature increases to 30°C?
N2O2 draw valence bond drawings for the resonance forms-clearly labeling the sigma and pi bonds and hybrid orbitals.
the molecular orbital theory provide an explanation for the existence of the covalent molecule Na2 in the gaseous state. How would you predict Na2 by the Lewis theory?
What would be the result of a column chromatographic separation if the column chromatography was to be performed in the following eluents:
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