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Fluorine-18 is a radioisotope widely used in positron emission tomography to investigate brain activity. The half-life is 109.8 minutes. How long will it take for 2.75 ug of 18F to decay to 500 ng?
When electrons in a molecule are not found between a pair of atoms but move throughout the molecule, this is called
The solid KIO3 is diluted shy of the 100mL mark in the volumetric flask. does this technique error result in a reported molar concentration of KIO3 that is too high or too low
10 ml of a silver nitrate solution is titrated to the equivalence point with 8.5 ml of a .1100 M HCL solution. What is the concentration of the silver nitrate?
Understanding the basics of thermal chemistry and The Second Law of Thermodynamics indicates that a system
clockwise direction around a circular track with a constant speed of 200 km/hr. if is at the southernmost end of the track then determine the velocity of the car?also express your answer in M/S
For the following pair of polymers, state whether or not it is possible to determine whether one polymer is more likely to crystallize than the other. 1) linear and syndiotactic polypropylene
Write a balanced SN1 chemical equation between each alkyl halide and the best nucleophile in solution.
A mixture of ammonium chloride and sand is placed in an evaporating dish and massed at 56.246g. The mixture is heated, driving off the ammonium chloride and massed again
Suppose that you are carrying out a dehydrohalogenation reaction on 2-bromo-2,3-dimethylpentane to yield alkenes
A 9.0×10-2 M solution of a monoprotic acid has a percent dissociation of 0.60%. Determine the acid ionization constant Ka for the acid.
calculate the moles of CO2 you would theoretically expect from 0.253 grams of an alka-seltzer tablet at 721. torr and 291. K.
Hydrobromic acid reacts with potassium carbonate to form potassium bromide,carbon dioxide , and water. Barney the incompetent lab tech accidently knocked a flask containing 255ml of 0.500 M hydrobromic acid onto the floor, and now he has to clean ..
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