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In this lab, the measurement wavelength on the colorimeter was set at 470 nm. This measurement wavelength was the best choice available on the colorimeter but it was not the best chemical choice for measuring the absorbance of FeSCN2+. a. (5 pts) In terms of instrument sensitivity, explain why the choice of wavelength on the colorimeter is important. b. (5 pts) Since the wavelength setting was not the ideal wavelength (?max) for these absorbance measurements, do you expect the value for your absorbance readings to be too high, too low, or unaffected by the colorimeter setup? Explain. c. (10 pts) What experiment could you do, what data would you collect, and how would you analyze the data to determine the best setting for measuring the absorbance of FeSCN2+? Be sure to fully explain how your experiment and the resulting data would allow you to determine the wavelength of maximum absorbance for the FeSCN2+ complex.
When two atoms of 2H (deuterium) are fused to form one atom of 4He (helium), the total energy evolved is 3.83 × 10-12 joules. What is the total change in mass
Compute the pressure (in atmospheres) Using the van der Waals equation, exerted by water(H2O) of 23.93 grams at 36.11 degree celsius in a 1.00 Litre container.
How many moles of PCl_5 can be produced from 21.0 g of P_4 and excess Cl_2?
Solid silver nitrate is added to a solution that is 0.0010 M each in NaCl, NaBr, and NaI. For AgI, ksp= 1.5x10^-16, for AgBr, ksp= 3.3x10^-13, and for AgCl, ksp= 1.8x10^-10
The specific heat of aluminum is 0.21 cal g°C. How much heat is released when a 10 gram piece of aluminum foil is taken out of the oven and cools from 50 to 10 °C?
Calculate the amount of energy released when 8.02g of Hydrogen reacts with excess Oxygen.
Express the concentration of a 0.0280 M aqueous solution of fluoride in mass percentage and in parts per million.
What is the magnitude of the electric field amplitude associated with the beam and the corresponding photon density per cm3?
Silver nitrate reacts with ferric chloride to give silver chloride a ferric nitrate. In a particular expriment, it was planned to mix a solution .
Calculate the final temperature of 32 mL of ethanol initially at 11 degrees C upon absorption of 562 J of heat.
Calculate the average speed of a gas that has a molar mass of 2.08 × 10-2 kg /?mol at a temperature of 22°C. The value for the gas constant, R, is 8.314 J /?mol K.
Physiological saline solutions used for intravenous injections have a concentration of 0.90% NaCl by weight
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