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Consider two different solutions of the same UV-absorbing compound. Upon UV-analysis Solution B provided an absorbance of 1.5 and Solution A provided an absorbance of .5 at the same wavelength. Solution B is higher in concentration by what ratio (or %)? Hint A= ε x c x 1.
Find the concentration of Pb2 in 0.0010 M KI saturated with PbI2. Include activity coefficients in your solubility-product expression. The Ksp of PbI2 is 9.8× 10-9. Hint from sapling below: Including activity coefficients, the solubility-product e..
The vapor pressure of pure acetone (propanone) is 266 torr. When a non-volatile solute is added, the vapor pressure of acetone above the solution falls to 232 torr. What is the mole fraction of acetone in the solution?
what is the relative error in the determination of a density for which the accepted value is 0.945 g*cm^-3 and the experimental value
calculate the enthalpy change for the following reaction.4 chcl3 l 5 o2 g ---gt 4 co2 g 2 h2o l 6 cl2 gsubstance
an aqueous ammonium chloride solution rather than sulfuric acidis used in the hydrolysis of the magnesium complex
The value of ?Go for the reaction, N2(g) + 3 H2(g) 2 NH3(g) is -32.90 kJ at 298 K. Calculate the value of ?G in kJ at 298 K if the partial pressures of N2, H2 and NH3 are 9.139, 8.009, and 9.718 atm respectively.
A 2.154 g sample of HgO produces 125 mL of oxygen gas. The gas is collected over water at 24 C and an atmospheric pressure of 763 torr.
A sample of pure NO2 is heated to 336 C at which temperature it partially dissociates according to the equation2NO2->O2+2NO
if 5.00 grams of NaHCO3 decomposes, what is the mass of the carbon dioxide produced?
The enthalpy of combustion of benzoic acid is commonly used as the standard for calibrating constant-volume bomb calorimeters; its value has been accurately determined to be 3226.7kJ/mol.
What is the density of lead (in ) if a rectangular bar measuring 0.500 in height, 1.55 in width, and 25.00 in length has a mass of 220.9 ?
Draw the kekule structure of each of the following compounds. if cis/trans isomers exist, draw both and indicate the geometry of each.
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