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Question: Quinine in a 1.664 g antimalarial tablet was dissolved in 0.10 M HCl to give 500 mL of solution. A 15.00 mL aliquot was then diluted to 100.0 mL with acid. The absorbance for the diluted sample at 247.5 nm provided a reading of 0.288 on an arbitrary scale. When measured under conditions identical to those for the diluted sample, a standard 100 ppm quinine solution registered 0.180. Calculate the mass in milligrams of quinine in the tablet.
The Gibbs free energy G is the thermodynamic potential that is minimized when a thermodynamic system reaches equilibrium. The free energy change of a reaction ?rxnG can be seen as the slope of a curve representing the progress of the transformatio..
What is the theoretical yield of calcium carbonate if 2.05 grams of calcium chloride dihydrate reacts with excess sodium carbonate according to the balanced chemical reaction shown below?
Calculate the % atom economy for the following two methods for converting benzene, C6H6, to aniline, C6H5NH2.
What is the half-life in minutes of a compound if 75.0 percent of a given sample decomposes in 85.0 minutes? Assume first order kinetics
A piece of galena has a volume of 3.9 cm3. If the density of galena is 7.5 g/cm3, what is the mass (in kg) of that piece of galena?
Problem- How many seconds does it take to deposit a 1.63 g of Ni on a decorative drawer handle when 17.8 A is passed through a Ni(NO3)2 solution
A young 44.0 pound patient is prescribed Vistaril for nausea. Standard dosage is 0.500 mg/kg per day. Compute the mg of Vistaril needed for one day.
A diatomic gas does 315 J of work and also absorbs 580 cal of heat. What is the change in internal energy of the gas?
Provided a mixture of three different compounds A, B and C to perform a chromatographic experiment using TLC. Separate experiments with the pure compounds showed the Rf values of A and B
what mimimum hydronium ion concentration m would be needed to prevent precipitation of cupric hydroxide cuoh2 ltgt cu2
What is the numerical value of the rate constant and what are the units? D) Calculate the rate of this reaction when the initial concentrations of OCl- and I- are 7.6 x10-3 M and 9.6 x 10-3M respectively.
Iodine deficiency can cause a goiter, which is an enlargement of the thyroid gland. You are sent to Pakistan to make field measurements of the concentration of iodide (I-) that is present in groundwater. (a) Oxidize I- in sample to I2 with potassiu..
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