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3.5 curies of 18-F can are formed in a 2 hour irradiation of 18-O using 19MeV protons with 35 A beam current. Explain the half-life of 18-F is 16 minutes. It takes 132 minutes to label deoxyglucose to make the PET scanning reagent Fludeoxyglucose. Explain how many curies of radioactivity remain in the product?
The Ka of lactic acid, HC3H5O3, is 1.410?4. (a) Suppose buffer #1 is prepared using 40.0 mL 0.1 M HC3H5O3 and 60.0 mL 0.1 M C3H5O3- to give a final volume of 100.0 mL. What is the pH of this buffer
Butyric acid (a monoprotic acid) is responsible for the foul smell of rancid butter. the pKa of butyric acid is 4.84. calculate the pH of a 0.05M sloution of sodium butyrate
an ideal solution is created by mixing a and b in the molar ratio 23. the mixture has a normal boiling point at 85
When a base is added to an acid they neutralize each other except when they make a pH of 7, in this case find the exact amount for the two solutions below
Seven tiny spheres of liquid mercury each have a diameter of 2 millimeters. They are now added together and coalesce into one larger drop. What is the diameter of this larger drop?
What is the volume of an object that has a mass of 3.4 g and a density of 2.4 g/mL? choose one below: 1.4 mL 0.71 mL 1400 mL 710 L 14 mL
In conducting a titration of 75.00mL of a certain triprotic acid with 0.0800 M NaOH the following information was recorded. a. the first equivalence point was observed at pH 3.96 after the addition of 12.4 mL of NaOH
A balloon filled with 2.50 moles of helium has a volume of 32.4 L. What will be the new volume if 5.90 moles are added under constant temperature and pressure?
The reaction x = Y is first -order overall and first-order with respect to the reactant x. The result of doubling the initial concentration of X will be to
In the haloform reaction, once the first alpha-hydrogen atom is replaced by a halogen atom, each successive hydrogen is more easily substituted
The free energy change Delta Gt at 500 K is equal to 9.8x10^4 J/mol. Calculate the equilibrium constant at 500 K.
The water temperature before the reaction was 34.5°C, and after the reaction it had risen to 52.0°C. How many moles of water were formed?
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