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Bathophenanthroline is a compound that forms a red complex with iron(II). The molar absorptivity for the complex is 22,350 L mol^-1 cm^-1 at wavelength 535 nm.a)Determine the molar concentration range of the iron(II)-bathophenanthroline complex that can be analyzed directly with a spectrophotometer, using a 1-cm cuvette.b)Convert the molar concentrations calculated above to grams of iron(II) per liter of solution. Comment on the sensitivity of the method in determining the concentration of iron(II).
What is the final temperature of the copper and water after they come to thermal equilibrium? (the specific heat of copper is 0.385 J/gxK).
What is the equivalent mass of metal that is dissolved in sulfuric acid during hydrogen release if 2.27 g metal reacts with 30 ml 33 w/w% H2SO4 (density 1.25 g/cm^3,
what is the molarity of a saturated solution of AgOH with a Ksp = 2.0 x 10^ -8
small samples of oxygen gas needed in the laboratory can be generated by any number of simple chemical reactions such
Write a balanced chemical equation for the reaction between CN - and MnO4- in basic solution. The skeleton ionic reaction is given below.
A star is estimated to have a mass of 1x10^36 kg. Assuming it to be a sphere of average radius 7.5x10^5 km, calculate the average density of the star in units of grams per cubic centimeter.
a solution is prepared by dissolving 23.7g of CaCl2 in 375g of water. The density of the resulting solution is 1.05g/mL.
Using the data given below, calculate the residence times of the solutes in seawater. The amount of water flowing from rivers to oceans = 3.74 x 10^19 g yr-1 , and the amount of water in oceans = 1.35 x 10^24. What is the residence times of these ..
suppose that a particular reaction evolves heat of 228 kj and that 40 kj of pv work is gained by the system. determine
When a 8.37-g mixture of methane, CH4, and ethane, C2H6, is burned in oxygen at constant pressure, 445.8 kJ of heat is liberated. What is the percentage by mass of CH4 in the mixture
A 144-mL portion of that solution is diluted by adding 169 mL of water. What is the final concentration? Assume the volumes are additive.
Jerry forgot to record the actual molar concentration of the standard HCL solution ( which was actually 0.044M), However to complete the calculations quickly the 0.05 M concentration was used. Will the reported molar solubility of the Ca(OH)2 be t..
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