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10.00mL of 1.98· 10-3 mol/L NaSCN solutionwere mixed with 10.00mL of 8.07· 10-4 mol/L iron(III) nitrate solution. When the reaction reached equilibrium, the absorbance measured at 447 nm was equal to 0.341. The pathlength ofthe cuvette used in the experiment was 1.00cm, and the extinction coefficient (e) of the FeSCN2+ complex at 447 nm is 4400L mol-1 cm-1.What is the value of the equilibrium constant of the reaction?
While in Europe, if you drive 107 km per day, how much money would you spend on gas in one week if gas costs 1.10 per liter and your car's gas mileage is 26.0.
A 0.542 g sample of an unknown monoprotic weak acid requires 28.67 mL of 0.1093 M NaOH for neutralization. What is the molar mass of the acid
What is the relationship between energy and the wavelength of an electromagnetic radiation
The possible compounds are listed below. Two methods of positive identification are required for each compound. Benzoic acid benzoin 1,4-dibromobenzene flourene o-Toluic Acid 4-aminoacetophenone
How many grams of heavy water are required to produce 145.0 mg of ND3(g). The mass of deuterium, D, is 2.014 g/mol
The gas phase reaction A + B ® C has a reaction rate which is experimentally observed to follow the relationship rate = k[A]2[B]. Which one of the following would affect the value of the specific rate constant
Write a balanced chemical equation showing the formation of the salt, Na3PO4, from the reaction of the appropriate strong acid and strong base, and name each compound in the equation.
What is the molality of a solution formed by dissolving 1.70 mol of KCl in 15.0 mol of water (MM of water = 18.02 g/mol),
5ml of solution A was added to enough water to make 100ml of solution B. Finally 5ml of solution B was added to enough water to make 100ml of solution C. What was the concentration of Erythrosin B in solution A,B, C
A urine sample was found to have a pH of 5.83. What would be the ratio of the unprotonated form, A, to the protonated form, HA, for uric acid in this urine sample?
A balloon filled with helium gas at 20C occupies 2.91 L at 1.00 atm. The balloon is immersed in liquid nitrogen at -196C, raising the pressure to 5.20 atm.
Arsenic acid (H3AsO4) is a triprotic acid with Ka1 = 5. 10-3, Ka2 = 8. 10-8, and Ka3 = 6. 10-10. Calculate [H + ], [OH ? ], [H3AsO4], [H2AsO4? ], [HAsO42- ], and [AsO43- ] in a 0.23 M arsenic acid solution.
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