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A sample of 0.7500 g of a monoprotic weak acid, HA, is mixed in enough distilled water to produce 50.0 mL of a solution with a pH of 2.716. The solution is titrated with 0.1500 M NaOH, and in the middle of the titration, when [HA] = [A-], the pH = 4.602. Getting to the titration final point of the titration requires 49.30 mL of the titration agent.
Calculate the Ka of the acid.
A typical adult bdy contais 6 liters of blood. The hemoglobin content of blood is about 15.5G /100mL. The approximately molecular weight of hemoglobin is 64500 g/mol. How many moles of hemoglobin are present in a typical adult
A flask contains 10.0 mL of HCl and a few drops of phenolphthalein indicator. The buret contains 50.0 mL of 0.230 M NaOH. what volume of NaOH is needed to reach the end point of the titration
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Which ionic compound would be expected to have the highest lattice energy (a) KO2 (b)NaO2 (c) Li2O (d) RbO2 (15) Arrange the following spectral regions in orger of increasing energy infrared, microwave, ultraviolet visible (a) microwave
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The specific heat of a certain type of metal is 0.128 J/(g x C). What is the final temperature is 305 J of heat is added to 63.8 g of this metal initially at 20.0 C
When 35.0 g of an unknown nonelectrolyte is dissolved in 220.0 g of benzene, the solution boils at 83.2°C. Calculate the molecular weight of the unknown nonelectrolyte. The Kb for benzene = 2.53°C/m. The boiling point of pure benzene is 80.1°C.
If you wished to prepare t-butyl propyl ether by a Williamson Synthesis, there are two possible combinations of materials you could choose as alternatives.
A solution containing 3.47mM X (analyte) and 1.72 mM S (standard) gave peak areas of 3473 and 10222, respectively, in a chromatographic analysis. Then 1.00ml of 8.47mM S was added to 5.00ml of unknown X, and the mixture was diluted to 10.0ml. This..
Choose the element with the more negative (more exothermic) electron affinity from each of the following pairs.
The nuclide 18f decays by both electron capture and beta plus decay. Find the difference in the energy released by these two processes. The atomic masses are 18F = 18.000950 and 18O= 17.9991598.
Calculate the pH of a 25 mL distilled water sample after the addition of 1mL, 2mL, 3mL, 4mL
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