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Estimate the molar absorptive of KMnO4 at 520nm when a solution which is having the 6.23 ppm of KMnO4 had a transmittance of the 0.195 in a 1.00-cm cell at 520nm.
What is the absorbance of a 3.79 *10 -5 M solution of the complex at 470nm in a 1.00-cm cell when a solution containing the complex produced between the Bi (III) and theorem has a molar a
A aliquot which is having 2.50-ml of a solution that contains 7.9 ppm iron(III) is treated with an appropriate excess of KSCN to produce the Fe(SCN) 2+ complex and diluted to the 50.0 ml.
A mixture of H2O and CH4 is passed over a nickel catalyst at the1000 K. The emerging gas is collected in a 5.00L flask and is found to contain 2.60 g of H2, 8.62 g of CO, 43.0 g of CH4, and 48.4 g of
Determine the numbers of grams of the nonvolatile solute glycerol, C3H5 (OH)3, must be added to 113 g of methanol to obtain a solution with a vapor pressure of 139 torr when the vapor pressu
Describe why a molecule may have a polar end and a non-polar end. Is it because the level of covalence is different among certain bonds?
The bond between hemoglobin and CO absorbs radiation of1953cm^-1. (the units are recipricol of the wavelength in cm)Calculate the wavelength in nm and A. And find frequency inHz.
Estimate the number of steps it would take you by using a single dimensional equation, walking at your normal stride, to walk from the Earth to Alpha Centauri, a distance of 4.3 light years and the
Determine y-intercept of line containing points(6,-1) and (-8,0). Write the answer correct to three decimal places. Determine slope of line having the points (6,4)and (-7,8).
The vapor pressure of ethanol is 800Torr at 80oC. At the same temperature the vapor pressure of water is 370 Torr. A sample which is having the 100 g water at 80oCis mixed with ethanol at the same tem
A mixture of Cu2O which is having 4.6127-gram (molar mass 143.091 grams) and CuO (molar mass 79.545 grams) was treated to remove all the oxygen.
The simple fluorides XeF2, XeF4, andXeF6 are all formed by direct reaction of the elements. "Inert" xenon actually forms several compounds, especially with the highly electronegative elements
The average atomic radius of an Fe-V solid solution can be measured by adding the atomic radii of V and Fe, weighted by their respective atom fractions.
Determine the radius of circle with equation. Compute coordinates of center of circle with equation. Determine sum of h and k coordinates of center?
A solid non-electrolyte which is having 0.600 g dissolved in the 100 mL water. The observed freezing point is-0.200oC. Determine the approximate molecular mass of the compound? (Kf = 1.86 oC
Determine the concentration of calcium ion in a saturated solution prepared by adding pure CaCO3 to pure distilled water when the Ksp of CaCO3 in the form of calcite is 4.5 x 10-9.
Hydrocarbons do not dissolve in the concentrated sulfuric acid, but methyl benzoate does. Describe this difference and written equation showing the ions that are formed.
What function predicts for percent of freshmenentering college in 2002 who did volunteer work during their last year of high school? How this compares to actual percent of 82.6?
How do you determine the formal charges for the different atom types (four single bond, two double bond & two single bond, four double bond) of each structure?
Determine the rate of formation of NO2 *10-6 mol/L/s? Calculate the rate of formation of O2 *10-6 mol/L/s. At a certain moment in the reaction 2N2O5 → 4NO2+ O2, N2O5
Based on the thermo chemical date in Le chatelier's principle, calculate whether the solubility of AgCl in H2O increases or decreases with increasing temperature
Write the supporting equations or mechanism where the appropriate or possible, comment on the likely sources of error in a Grignard reaction-based synthesis?
Discuss the chemical basis for the use of the following reagents in this experiment which is the synthesis of Insect pheromones.
Determine the transmetallation? On what chemical principle is it based? Write down an equation to illustrate a transmetallation reaction?
Determine the mass percent iron in the sample if 25.58 mL of 0.10445M K2CrO7 were needed to reach the equivalence point?