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1) a student who was in a hurry to complete this experiment didn't completely dry the crystalline product before the final weighing. how would this error affect the calculated percent yield of the experiment? 2) the student in (1) didn't bother to cool the water used to wash the crystals. how would this error affect the calculated percent yield of the experiment? 3) the same student mixed the crystalline product with ethanolic 1% FeCl3 solution and obtained a colored solution. briefly explain what might have caused this result.
Explain different moderators used in nuclear reactors
A specific steroid has ?max = 213 nm and molar absorptivity ? = 11,500. What is the concentration of the compound in a solution whose absorbance at 213 nm is A = 0.060 with a sample pathlength of 1.00 cm?
a mixture of ch4 and h2o is passed over a nickel catalyst at 1000 k. the emerging gas is collected in a 5.00 l flask
nathen and su-liu have new jobs at the fun house. they have been given the job of counting the balls in the kiddie
A 325-mL sample of solution contains 25.3 g of CaCl2, which is fully dissolved. (a) Calculate the molar concentration of Cl- in this solution. (b) How many grams of Cl- are in 0.100 L of this solution?
Calculate the pH during the titration of 10.00 mL of 0.400 M hypochlorous acid with 0.500 M NaOH. First what is the initial pH (before any NaOH is added). The Ka for HOCl is 3.0 x 10-8 M.
Photochemical chlorination of heptane gave a mixture of monochlorides containing 15% 1-chloroheptane. What other monochlorides are present? Estimate the percentage of each of these additioanl C7H15Cl isomers in a monochloride fraction.
In the reaction below, 3.84 atm each of H2 and Cl2 were placed into a 1.00 L flask and allowed to react: H2(g) + Cl2(g) 2 HCl(g) Given that Kc = 62.1, calculate the equilibrium pressure of HCl.
In which of the following reactions would increasing pressure at constant temperature not change the concentrations of reactants and products, based on Le Ch telier's principle
The pH of an aqueous weak acid solution is 6.20 at 25 degree celsius. Calculate the Ka for the acid. The initial concentration of the acid is 0.010M
Which of the following best describes a competitive inhibitor, I: A. As [I] increases, there is a decrease in VMAX and an increase in KM,app. B. As [I] increases, there is a decrease in VMAX and an decrease in KM,app
If an aluminum nitrate solution is added to a sodium fluoride solution the following equilibrium will be reached: Al3+(aq) + 6 F-(aq) mc035-1.jpg AlF63-(aq) For this equilibrium, K = 5.0 ´1023
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